Previous PR: #137115, 
Revert: #142464
Fixes #141940
Closes #142487

This reverts commit f5ac225c, i.e. https://github.com/flutter/flutter/pull/137115.

This is a continuation of https://github.com/flutter/flutter/pull/142266 that was redone based on feedback to make this easier to revert in the future. The exact steps I took to create this revert:

1. Revert commit noted above
2. Fix merge conflicts, that notably involved reverting some changes in https://github.com/flutter/flutter/pull/140744 ~and https://github.com/flutter/flutter/pull/141417~ (fixed my merge to avoid the second PR from being affected)
3. Delete `packages/flutter_tools/test/integration.shard/android_plugin_skip_unsupported_test.dart` as this was added in the commit noted above

cc @Gustl22 since I couldn't tag as a reviewer

Relands #97823

When the tool migrated to `.flutter-plugins-dependencies`, the Gradle plugin was never changed.
Until now, the plugin had the heuristic that a plugin with a `android/build.gradle` file supported the Android platform.

Also applies schema of `getPluginDependencies` to `getPluginList` which uses a `List` of Object instead of `Properties`.

Fixes #97729
Cause of the error: https://github.com/flutter/flutter/blob/5f105a6ca7a5ac7b8bc9b241f4c2d86f4188cf5c/packages/flutter_tools/gradle/flutter.gradle#L421C25-L421C25

Fixes #98048
The deprecated line `include ":$name"` in `settings.gradle` (pluginEach) in old projects causes the `project.rootProject.findProject` to also find the plugin "project", so it is not failing on the `afterEvaluate` method. But the plugin shouldn't be included in the first place as it fails with `Could not find method implementation() for arguments` error in special cases.

Related to #48918, see [_writeFlutterPluginsListLegacy](https://github.com/flutter/flutter/blob/27bc1cf61a5b54bf655062be63050123abb617e4/packages/flutter_tools/lib/src/flutter_plugins.dart#L248).
Co-authored-by: Emmanuel Garcia <egarciad@google.com>