15566 Fix embedder mutation order (cla: yes)

15568 Fix hardware keyboard enter so it triggers an action. (affects: desktop, affects: text input, cla: yes)

15569 Change the value of EXTRA_INITIAL_ROUTE to match the value used by the old embedding and flutter_tools (cla: yes)

15570 [fuchsia] HitTesting for fuchsia a11y (cla: yes)

15573 Fix Opacity performance regression on Fuchsia (cla: yes)

15584 Roll src/third_party/skia 69ace2a0adbe..e45c5cd03eeb (23 commits) (autoroller: commit, cla: yes)

15602 Add –lazy_async_stacks to the set of whitelisted VM flags. (cla: yes)