40165 Channel buffers

12402 Resize channel buffers

6879 Allow FlutterViewController to be released when not initialized with an engine

9329 Fixed memory leak by way of accidental retain on implicit self

9347 Surrogate binary messenger

9419 Has a binary messenger

8387 Make the resource context primary on iOS

11798 Manage resource and onscreen contexts using separate IOSGLContext objects

12277 Manage resource and onscreen contexts using separate IOSGLContext objects

13396 Made it so we clean up gl resources when view controllers get deleted.

39157 Use new Maven artifacts from Gradle

39503 Remove bitcode=NO from add-to-app flows