22337 Revert “Added the ability to set the initial route via launch urls. (… (cla: yes, platform-ios, waiting for tree to go green)

22339 Roll Skia from f8f23b203079 to 8d0f710ef0e0 (2 revisions) (cla: yes, waiting for tree to go green)

22340 Use dispatchKeyEvent, and handle keys sent to InputConnection.sendKeyEvent on Android (cla: yes, platform-android)

22341 Roll Dart SDK from 9bc7d4604277 to 1936a7d1909d (2 revisions) (cla: yes, waiting for tree to go green)

22342 [web] Fix recycling same canvas more than once and add assert to detect (cla: yes)