Closes https://github.com/flutter/flutter/issues/157629.
Avoids failures in the style:
```txt
00:37 +4597 ~3 -1: /Users/matanl/Developer/flutter/packages/flutter_tools/test/commands.shard/permeable/build_appbundle_test.dart: analytics logs success [E]
Expected: contains Event:<{"eventName":"flutter_command_result","eventData":{"commandPath":"create","result":"success","commandHasTerminal":false,"maxRss":147013632}}>
Actual: [
Event:{"eventName":"command_usage_values","eventData":{"workflow":"create","commandHasTerminal":false,"createProjectType":"app","createAndroidLanguage":"kotlin","createIosLanguage":"swift"}},
Event:{"eventName":"flutter_command_result","eventData":{"commandPath":"create","result":"success","commandHasTerminal":false,"maxRss":143261696}},
Event:{"eventName":"timing","eventData":{"workflow":"flutter","variableName":"create","elapsedMilliseconds":527,"label":"success"}},
Event:{"eventName":"command_usage_values","eventData":{"workflow":"appbundle","commandHasTerminal":false,"buildAppBundleTargetPlatform":"android-arm,android-arm64,android-x64","buildAppBundleBuildMode":"release"}},
Event:{"eventName":"flutter_command_result","eventData":{"commandPath":"appbundle","result":"success","commandHasTerminal":false,"maxRss":147013632}},
Event:{"eventName":"timing","eventData":{"workflow":"flutter","variableName":"appbundle","elapsedMilliseconds":10,"label":"success"}}
]
Which: does not contain Event:<{"eventName":"flutter_command_result","eventData":{"commandPath":"create","result":"success","commandHasTerminal":false,"maxRss":147013632}}>
```
I am guessing <https://api.flutter.dev/flutter/dart-io/ProcessInfo/maxRss.html> is not guaranteed to be stable while running, and as a result is not. This stabilizes the value for a test that I believe does not care about getting the "real" value anyway.
Reverts flutter/flutter#126086.
This PR changed the interfaces of some classes, namely `AndroidSdk`, and deleted a global.
These classes had custom overrides in g3 that were not updated with a g3fix, so this PR has broken tests. See https://b.corp.google.com/issues/281945232 (non-public link)
This is the first step in unifying Java-finding logic across the tool. If curious, see #126029 for an example of what all the changes will probably entail.
Moves java-related functionality like `AndroidSdk.findJavaHome` to a new class, `Java`.
See tracking issue https://github.com/flutter/flutter/issues/126126 for more.
Our current top crasher is an unclear error when ProcessManager fails to resolve an executable path. To fix this, we'd like to being adjusting the process resolution logic and adding more instrumentation to track failures. In order to begin the process, the ProcessManager has been folded back into the flutter tool
