Revert "Reland "Upgrade Gradle and AGP versions to 7.5/7.2 and migrate benchmarks+examples" (#108355)" (#108407)

This reverts commit c4b3625d.

* Modify dataMap to include assertiveness only if it's not set to polite to prevent google3 tests from breaking

* small code style enhancement

* 125a4b4a0 Roll Skia from c334e0933076 to a9d44a41296f (1 revision) (flutter/engine#34909)

* 763feb4a0 Roll Skia from a9d44a41296f to b7e27876f093 (1 revision) (flutter/engine#34911)

* 9388b8ec4 [Impeller] [vulkan] Wire-up creating pipeline (flutter/engine#34890)

* bdcc9603d Roll buildroot deps (flutter/engine#34894)

* 9a8686477 Roll Dart SDK from c77db322733f to 52c6d32a67b6 (1 revision) (flutter/engine#34914)

* 1a9eb883b Roll Fuchsia Linux SDK from JG8eZzFic... to 4xjxrGUrD... (flutter/engine#34915)

* 4c613a63a Remove the OpenGL backend on iOS (flutter/engine#34913)

[gen_l10n] Warn users when placeholder types are converted to 'num' when using pluralization (#108036)

* init

* asdf

* fix tests

* change warning slightly

* fix test again

* fix spacing and comment

* fix lint

* Hide the debug banner in the PopupMenuButton example

* Add test to verify that debug banner is not shown

* [flutter_tools] [dap] Ensure DAP sends app.stop/app.detach during terminate

Fixes an issue where the flutter_tester device may not be cleaned up correctly if we just terminate the Flutter process.

* Update integration test expectations

* Revert accidental commit

Explain the "patching" protocol in `KeyMessageManager.keyMessageHandler` and add an example (#105280)

This reverts commit ca6cecf0.