13466 [fuchsia] Bundle stripped SO files in fars (CQ+1, cla: yes)

13467 Revert 78a8ca0f62b04fa49030ecdd2d91726c0639401f (CQ+1, cla: yes)

13468 Pass the automaticallyRegisterPlugins flag to the FlutterEngine constructor in FlutterActivityTest (cla: yes)

13469 Fix stale platform view gr context on iOS (cla: yes)

13471 Package fml_unittests in a .far file for fml unit tests on Fuchsia (cla: yes)

13474 Request a reattach when creating the text input plugin on Android (cla: yes, waiting for tree to go green)

13478 use check_output instead of check_call (cla: yes)