Previously flutter_tools had used "gradle properties" to find the build types
and flavors supported by the Gradle project. Tasks should work more reliably
across different versions of the Android Gradle plugin.
Fixes https://github.com/flutter/flutter/issues/20781
* Change assert_bundle_package_font_test to memory file system
This is to work towards being able to run the tests without `-j1` (#21113). These tests were using the real filesystem and setting/relying on fs.currentDirectory. There was a comment about this being because the memory provider didnt' support POSIX and Windows, however that seems to have changed since (and many other asset tests already do something similar to this).
* Trim trailing whitespace
* Add a workaround for Windows path slash directions
Strictly this is correct, but the real FS can tolerate either path. The in-memory file system is more strict (see https://github.com/google/file.dart/issues/112).
* Extract a helper for writing schema files in tests
* Missed file when saving!
* Remove redundant comment
* Rename writeBasicSchema -> writeEmptySchema
* Use the file we already have to write contents
* Make comments more descriptive
* Remove another dupe of writeSchema to use the shared one
* Rename schema -> pubspec_schema
* Trim whitespace
* Upgrade everything except matcher.
* Roll matcher (and test)
* Adjust tests that depend on flutter:test directly to depend on a shim
* Require use of package:test shim and remove other references to package:test
Uses the `version` property from the `pubspec.yaml` file to set the corresponding fields in the `local.properties` file respectively in the `Generated.xcconfig` file.
The `--build-name` and `--build-number` options have changed. Now they trump the `version` property from the `pubspec.yaml` file.
If the `version` property is not set and the `--build-name` and `--build-number` options are not provided, the build command will not change the `local.properties` / `Generated.xcconfig` file.
