1115 Migrate remaining plugins to AndroidX (cla: yes)

1116 Add WebView JavaScript channels (Dart side). (cla: yes)

1117 [firebase_auth] Update a broken dependency. (cla: yes)

1118 [IAP] Update dev deps to match flutter_driver (cla: yes)

1120 A few additional Androix dependencies (cla: yes)

1124 Updated launch to use async and await, fixed the incorrect return value by launch method. (cla: yes)

1125 Fixed image picker crash when used with android alarm manager (cla: yes)

1126 [In_app_purchase] add payment translators in objc (cla: yes)

1127 Revert AndroidX changes for 1.0.0 plugins (cla: yes)