* flutter/engine@ac93919 v1.12.13+hotfix.3 cherry-picks
* flutter/engine@73da385 Disable a11y on detach
* d88345e only run codecov on master
* 6d848eb Name the docker_builer shard
* e98acc7 [flutter_tool] Print version info on a no-op upgrade
* 8eb6a92 Always compile with isysroot on iOS to point to SDK root
* fb69a39 Add bitcode and architectures to App.framework build ios framework command
* flutter/engine@6955b06 Cherry-picks for 1.12.13
* flutter/engine@3e6d6bc add pointer data santizing in flutter web engine
* 09126ab Enable Android embedding v2 on the beta, dev and stable channel
* 4c95bbd Re-enable hostonly tests on non-master branches
* 066a992 Ensure that docker tag is legal
* 4484ae4 [flutter_tool] Do not continue with a no-op 'upgrade'
There has been some confusion about whether or not
.flutter-plugins-dependencies should be tracked in version control or
not. Added a comment to both it and .flutter-plugins explaining that
it's generated and shouldn't be.
.flutter-plugins-dependencies is parsed through JSON, and the JSON spec
doesn't support comments. So unfortunately the note is living in an
arbitrary "_info" key instead of an obvious top level comment.
Todd Volkert
Jonah Williams
Alexandre Ardhuin
Emmanuel Garcia
Michael Klimushyn
Jenn Magder
Takeshi Tsukamoto
chunhtai
Kate Lovett
xster