26743 Roll Dart SDK from e48368c7cacb to 5fdf43fdde62 (1 revision) (cla: yes, waiting for tree to go green)

26745 Add family of dependencies that work on SPIRV. (cla: yes, waiting for tree to go green)

26746 Add native Android image decoders supported by API 28+ (platform-android, cla: yes)

26747 Roll Skia from d6c51edd5243 to 2705cbf9bd1d (1 revision) (cla: yes, waiting for tree to go green)

26748 Roll Skia from 2705cbf9bd1d to ef1f4991a688 (1 revision) (cla: yes, waiting for tree to go green)