29727 Use eglPresentationTimeANDROID to avoid bogging down the GPU (platform-ios, platform-android, cla: yes, embedder)

29728 Roll Fuchsia Linux SDK from voGtvLTY7… to JMFu-JhNu… (cla: yes, waiting for tree to go green)

29729 Roll Dart SDK from 528dc1f33e34 to 49356610a3be (1 revision) (cla: yes, waiting for tree to go green)

29730 Roll Fuchsia Mac SDK from Sg-XVB3Pw… to vgwJCsxOO… (cla: yes, waiting for tree to go green)

29731 fix x64_64 typo in comments (cla: yes, waiting for tree to go green)