13093 iOS Platform View: Fixed overrelease of the observer.

13170 Issue 13238: on iOS, force an orientation change when the current orientation is not allowed

13449 Fix iOS crash when multiple platform views are in the scene

13469 Fix stale platform view gr context on iOS

13651 Fixed the scroll direction for iOS horizontal accessibility scroll events.

13852 Do not default to downstream affinity on iOS insertText

13857 Guard against orphaned semantic objects from referencing dead accessibility bridge on iOS

1370 [camera] Pause/resume video recording for Android & iOS

1999 [Connectivity] add a method to request location on iOS (for iOS 13)

2052 [instrumentation_adapter] Add stub iOS implementation and example app