1128 Migrate to AndroidX forward roll (cla: yes)

1129 android_alarm_manager background execution bug fixes (bugfix, cla: yes, submit queue)

1130 WebView JavasScript channels Android implementation. (cla: yes, feature, webview)

1132 Use string to save double for shared_preference(Android). (bugfix, cla: yes, needs love, submit queue)

1133 Added support for persisting alarms across reboots (cla: yes, feature)

1134 Updated connectivity to singleton (cla: yes)

1135 FIx issue with calculating iOS image orientation in certain special c… (cla: yes)

1138 Add a gradle warning to the AndroidX plugins (cla: yes)

1139 WebView JavaScript channels - iOS implementation. (cla: yes)