Engine android CI should verify VisibleForTests field are not used #124890
Description
We had to send a revert in flutter/engine#41211 as this failed analysis checks on Google Testing, but not the LUCI checks.
shell/platform/android/io/flutter/plugin/editing/TextInputPlugin.java:239: Error: This method should only be accessed from tests or within private scope [VisibleForTests]
imeSyncCallback.remove();
My expectation is analysis checks like this should be caught in presubmit.