26328 prevent ios accessibility bridge from sending notification when modal (platform-ios, cla: yes, waiting for tree to go green)

26329 Clean up upload_metrics.sh (cla: yes)

26331 android platform channels: moved to direct buffers for c <-> java interop (platform-android, cla: yes, waiting for tree to go green)

26333 Handle only asset-only components case (platform-android, cla: yes)

26334 Roll Dart SDK from 1efa8657fe8e to 1c14e29fbfba (1 revision) (cla: yes, waiting for tree to go green)

26335 Sets a11y traversal order in android accessibility bridge (platform-android, cla: yes, waiting for tree to go green)