27922 [UWP] Remove 1px offset to make root widget fully shown (cla: yes, waiting for tree to go green, platform-windows)

27924 Fix the SurfaceTexture related crash by replacing the JNI weak global reference with WeakReference (platform-android, cla: yes, waiting for tree to go green, needs tests)

27926 Roll Skia from aef5dc78f38a to 94fcb37e5b4f (15 revisions) (cla: yes, waiting for tree to go green)

27929 added python version note to the luci script (cla: yes, waiting for tree to go green)

27934 Roll Fuchsia Mac SDK from rQOi2N8BM… to XuRmqkWX2… (cla: yes, waiting for tree to go green)