19325 Fix hybrid composition bugs (cla: yes, platform-android, waiting for tree to go green)

19339 Fix broken mac/fuchsia compiles (affects: tests, cla: yes, platform-android, platform-fuchsia, platform-ios, platform-linux, platform-macos, platform-windows)

19344 Implement onDisplayPlatformView (cla: yes, platform-android, waiting for tree to go green)

19402 Basic support for resizing overlay surfaces in hybrid composition (cla: yes, platform-android, waiting for tree to go green)

19421 Update scenario UI screenshoots (cla: yes, platform-android)

19426 Implement mutator stack on Android hybrid composition platform view (cla: yes, platform-android, waiting for tree to go green)