27009 [web] felt –watch fixes (cla: yes, platform-web, needs tests)

27048 Temporarily opt out of reduced shaders variants till roll issues are resolved. (cla: yes, waiting for tree to go green, needs tests, embedder)

27053 Fix use-after-free. (cla: yes, platform-fuchsia, needs tests)

27062 Fix crash when splash screen is not specified for FlutterFragmentActivity (platform-android, cla: yes, waiting for tree to go green, needs tests)

27070 [web][felt] Fix stdout inheritance for sub-processes (cla: yes, waiting for tree to go green, platform-web, needs tests)

27080 JavaDoc error fix  (platform-android, cla: yes, needs tests)