1699 [In_app_purchase] rename PurchaseError to IAPError and rename PurchaseSource to IAPSource (cla: yes)

1700 [android_alarm_manager] Wait in onHandleWork until the Dart callback returns a result (cla: yes)

1701 [cloud_firestore] Invoke on ui thread only (cla: yes, flutterfire)

1703 [package_info]Update README.md to reflect iOS issue. (cla: yes)

1705 Revert “1690” (cla: yes)

1707 Ensure that CocoaPods on Cirrus is always the latest version. (cla: yes)

1711 Initial plugins test app (cla: yes)

1712 [firebase_ml_vision] Separate integration tests (cla: yes)