Make Android team platform view TESTOWNERS (#169297)

Move `embedded_android_views_integration_test` and
`hybrid_android_views_integration_test` test ownership from plugins to
Android team.

Unrelated: I noticed `native_assets_android` is miscategorized, move
from `Mac iOS DeviceLab` to `Mac Android DeviceLab` section.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

TESTOWNERS

@@ -38,6 +38,7 @@
 /dev/devicelab/bin/tasks/cubic_bezier_perf_sksl_warmup__e2e_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/cull_opacity_perf__e2e_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/devtools_profile_start_test.dart @bkonyi @flutter/tool
+/dev/devicelab/bin/tasks/embedded_android_views_integration_test.dart @gmackall @flutter/android
 /dev/devicelab/bin/tasks/engine_dependency_proxy_test.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/fast_scroll_heavy_gridview__memory.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/flutter_engine_group_performance.dart @jtmcdole @flutter/engine
@@ -64,6 +65,7 @@
 /dev/devicelab/bin/tasks/gradient_static_perf__e2e_summary.dart @flar @flutter/engine
 /dev/devicelab/bin/tasks/gradle_java8_compile_test.dart @reidbaker @flutter/tool
 /dev/devicelab/bin/tasks/hot_mode_dev_cycle_linux__benchmark.dart @bkonyi @flutter/tool
+/dev/devicelab/bin/tasks/hybrid_android_views_integration_test.dart @gmackall @flutter/android
 /dev/devicelab/bin/tasks/image_list_jit_reported_duration.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/image_list_reported_duration.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/large_image_changer_perf_android.dart @jtmcdole @flutter/engine
@@ -133,7 +135,6 @@
 /dev/devicelab/bin/tasks/cubic_bezier_perf_sksl_warmup__timeline_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/cull_opacity_perf__timeline_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/drive_perf_debug_warning.dart @jtmcdole @flutter/engine
-/dev/devicelab/bin/tasks/embedded_android_views_integration_test.dart @stuartmorgan-g @flutter/plugin
 /dev/devicelab/bin/tasks/external_textures_integration_test.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/fading_child_animation_perf__timeline_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/fast_scroll_large_images__memory.dart @jtmcdole @flutter/engine
@@ -145,7 +146,6 @@
 /dev/devicelab/bin/tasks/hello_world_impeller.dart @gaaclarke @flutter/engine
 /dev/devicelab/bin/tasks/home_scroll_perf__timeline_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/hot_mode_dev_cycle__benchmark.dart @bkonyi @flutter/tool
-/dev/devicelab/bin/tasks/hybrid_android_views_integration_test.dart @stuartmorgan-g @flutter/plugin
 /dev/devicelab/bin/tasks/imagefiltered_transform_animation_perf__timeline_summary.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/integration_test_test.dart @bkonyi @flutter/tool
 /dev/devicelab/bin/tasks/integration_ui_driver.dart @bkonyi @flutter/tool
@@ -154,6 +154,7 @@
 /dev/devicelab/bin/tasks/integration_ui_screenshot.dart @bkonyi @flutter/tool
 /dev/devicelab/bin/tasks/integration_ui_textfield.dart @bkonyi @flutter/tool
 /dev/devicelab/bin/tasks/microbenchmarks.dart @jtmcdole @flutter/engine
+/dev/devicelab/bin/tasks/native_assets_android.dart @dcharkes @flutter/android
 /dev/devicelab/bin/tasks/new_gallery__transition_perf.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/new_gallery_impeller__transition_perf.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/new_gallery_impeller_old_zoom__transition_perf.dart @jonahwilliams @flutter/engine
@@ -207,7 +208,6 @@
 /dev/devicelab/bin/tasks/keyboard_hot_restart_ios.dart @loic-sharma @flutter/ios
 /dev/devicelab/bin/tasks/large_image_changer_perf_ios.dart @jtmcdole @flutter/engine
 /dev/devicelab/bin/tasks/microbenchmarks_ios.dart @louisehsu @flutter/engine
-/dev/devicelab/bin/tasks/native_assets_android.dart @dcharkes @flutter/android
 /dev/devicelab/bin/tasks/native_assets_ios.dart @dcharkes @flutter/ios
 /dev/devicelab/bin/tasks/native_platform_view_ui_tests_ios.dart @hellohuanlin @flutter/ios
 /dev/devicelab/bin/tasks/new_gallery_ios__transition_perf.dart @jtmcdole @flutter/engine