Changes since last roll:
```
ae0d3a553 Roll dart to 2765fcf2aecd3841d082fedaeafc00a73a965f8c. (#5160)
73b835c33 Roll src/third_party/skia/ 0caef298c..20fa1e94a (1 commit) (#5159)
f5c7cb366 Roll dart to b298fc6d8f6a0e1aa841dbbdda26663d6012a79a. (#5155)
93b85ee68 Add Android accessibility bridge support for "longPress" and "tap" semantic events
862d13c6f Roll src/third_party/skia/ 97b48a9c7..0caef298c (6 commits) (#5158)
9b7cc44df Dart bindings own the FDIO namespace. Release the engine side reference to the handle after bindings are setup. (#5156)
8896bd35a Roll src/third_party/skia/ f9ab22385..97b48a9c7 (11 commits; 1 trivial rolls) (#5154)
77910baad Roll src/third_party/skia/ 2050565fe..f9ab22385 (11 commits) (#5151)
0667cba31 Roll src/third_party/skia/ 3fef39d94..2050565fe (2 commits) (#5150)
5da171634 Roll src/third_party/skia/ ef4142a9b..3fef39d94 (1 commit) (#5148)
4ec4b3870 Roll src/third_party/skia/ c86c5c014..ef4142a9b (2 commits) (#5147)
d5c111717 Roll dart to 011676641a8b4b77bb372384c712709cbf037675 (#5146)
beb988c60 Roll src/third_party/skia/ 91368c9b9..c86c5c014 (4 commits) (#5145)
a58eabf14 Roll src/third_party/skia/ dc3192b30..91368c9b9 (12 commits; 1 trivial rolls) (#5144)
```
Changes since the last roll:
```
e11905c6e Add tooltip method to Android AccessibilityBridge (#5103)
2ee36e270 Always enable verbose logging on fuchsia. (#5104)
131349f83 Update flutter runner process name to reflect last running shell. (#5102)
ad9826cbb Roll src/third_party/skia/ c79e2d155..47ed6f10e (10 commits; 1 trivial rolls) (#5100)
7617d2889 libtxt: post-process glyph positions in order to accurately right-justify text (#5093)
895c965ce Set file modified callback. (#5096)
956f3eeca Roll src/third_party/skia/ 5c9369eb1..c79e2d155 (7 commits) (#5099)
6e5112214 Roll src/third_party/skia/ 643ab1bf5..5c9369eb1 (1 commit; 1 trivial rolls) (#5098)
a9180ca20 Roll src/third_party/skia/ 6b043cb9c..643ab1bf5 (3 commits; 3 trivial rolls) (#5097)
82d461049 Roll src/third_party/skia/ 1366282bc..6b043cb9c (2 commits) (#5095)
fb4926e65 Roll src/third_party/skia/ 580aee2fa..1366282bc (2 commits) (#5094)
c249b7026 Path metrics/getBounds/combinations again (#4957)
df255b828 Roll src/third_party/skia/ de5cffbc4..580aee2fa (16 commits) (#5092)
e44e1b49f Initial plugin support for background downloads + content fetching (#5082)
78f8a0f45 [fuchsia] Changes for running Dart 2 on flutter_runner. (#5080)
cbec56a3d Roll src/third_party/skia/ 77e95f706..de5cffbc4 (14 commits) (#5090)
8da9398ed Throw an exception if a secondary isolate tries to send a platform message (#5069)
```
flutter/engine@6a93ef1 Call SkGraphics::Init earlier on Fuchsia.
flutter/engine@f1234eb Add disabled failing test for floating point errors on matrix decomposition.
flutter/engine@ac68263 Hold a global reference to the AssetManager Java object backing the APKAssetProvider
flutter/engine@0e95bb2 Roll src/third_party/skia/ 2d2c1e32c..058f2e6ed (35 commits; 1 trivial rolls)
flutter/engine@3e20562 Roll src/third_party/skia/ 5209d7fce..2d2c1e32c (42 commits; 1 trivial rolls)
flutter/engine@a20fd83 [fuchsia] Remove dead package file generation from core snapshots.
flutter/engine@79b9ffb Fixup Fuchsia content handler post shell refactor.
This engine roll contains the following commits:
* flutter/engine@09d05a389: Prepare and run child isolates on a VM managed (i.e. no UI) task runner.
* flutter/engine@adee35142: Throw an error or return null if FlutterView.getBitmap fails
This contains the following commits:
flutter/engine@3cc8d82 Fix more Linux unittest targets.
flutter/engine@b6ba69b libtxt: add boxes representing empty lines in GetRectsForRange
flutter/engine@388f019 Enable downscale of very large images when uploading on IO thread
flutter/engine@22e1381 Allow runtime unit-test to perform dynamic symbol resolution for Dart snapshots.
flutter/engine@59d1366 Don’t build the host shell on target builds.
flutter/engine@7a6b779 Remove the weak pointer factory from the service isolate's DartIsolate object
flutter/engine@d4729ab Update the embedder GN target to use a source set instead of a complete static library.
flutter/engine@8973c73 Implement Scene::toImage for creating a raster image representation of a scene.
flutter/engine@572c584 Configure kernel paths in the embedder if the asset directory contains the kernel assets
flutter/engine@8ed932c Roll src/third_party/skia/ 1cd6098d5..1ccaa6e05 (20 commits)
flutter/engine@a0804f3 Simplify weak pointer factories and allow vending weak pointers on multiple threads.
* Handle error count reported by frontend.
Extend compilation result from single string to a structure(string filename and integer error count).
* Use ?.
* Include engine roll with dart sdk roll.
* parse(onError) -> tryParse
* Make '?? throw' more readable and avoid issue with analyzer
* Fix test so it mocks compiler output including errors count
Changes since last roll:
```
ed303c628 Roll dart sdk again. Previous roll required 23ae4fa098 revert. (#4966)
8cd272733 Revert "Roll dart to 7764e6962e22afcf4b58c4e3cef3147330f3c884. (#4960)" (#4965)
9199b40f2 Revert "Support multiple shells in a single process. (#4932)" (#4964)
6baff4c82 Support multiple shells in a single process. (#4932)
31c5bb427 Roll dart to 7764e6962e22afcf4b58c4e3cef3147330f3c884. (#4960)
c8e4c6984 Avoid copying the contents of large platform message responses (#4947)
5ff527295 Update to use new vulkan GrBackendRenderTarget ctor. (#4962)
0c8993a1a Update to use new vulkan GrBackendRenderTarget ctor (part 2) (#4963)
132ebdda8 Revert "Roll src/third_party/skia/ 9874bf1bc..52e16d984 (135 commits) (#4958)" (#4961)
11882ab9e Roll src/third_party/skia/ 9874bf1bc..52e16d984 (135 commits) (#4958)
```
Add consts
Includes:
* Revert "Roll dart to 4bcf8ad411bd90da16d44ad399bf350e8423eac9" (flutter/engine#4936)
* libtxt: render fake bold text if a bold font is not available (flutter/engine#4933)
* Set FlutterTexture copyPixelBuffer return nullable (flutter/engine#4934)
* Roll dart to 4bcf8ad411bd90da16d44ad399bf350e8423eac9 (flutter/engine#4929)
Includes:
* libtxt: add missing dependency for Mac/iOS builds (flutter/engine#4931)
* libtxt: use Helvetica as a fallback font on iOS 8 and earlier (flutter/engine#4930)
* Make Rect.largest match the "largest" rect used in DefaultLayerBuilder (flutter/engine#4926)
* [vulkan] Add VK_ERROR_NOT_PERMITTED_EXT
* Roll buildroot to 8dddd90bf9 (flutter/engine#4928)
* Set the asset bundle path when initializing the shell in the embedder API (flutter/engine#4925)
Changes since last roll:
```
ec1e96864 Revert pub roll from recent dart roll. (#4904)
ac552fba4 Port flutter content handler to FIDL2. (#4903)
94cdd8103 Roll dart. (#4902)
af63732de Support `Path.addCircle` (#4783)
564c6a5a9 Add hint to use ninja with goma (#4894)
```
```
Includes:
* libtxt: move to the next run if the current run ends before the start of the line block (flutter/engine#4891)
* Rolled Dart SDK to e3051175192c83fafa3636c0f16d804734bb285a (flutter/engine#4877)
