57871 [flutter_tools] rename output LICENSE file to NOTICES and support loading either (cla: yes, framework, team, tool)

57873 [flutter_tools] URI encode dart-define values (cla: yes, tool, waiting for tree to go green)

57874 [flutter_tools] throw if asked to build release for x86_64 (cla: yes, tool, waiting for tree to go green)

57907 flutter.gradle: collect list of Android plugins from .flutter-plugins-dependencies (cla: yes, tool)

57963 [flutter_tools] Support latest IntelliJ via Jetbrain toolbox (cla: yes, t: flutter doctor, tool)

58011 write test to convince self of lack of timing issue (cla: yes, tool)