Upgrade target version
Invalid 9-patch and is not used
Deprecated setPluginsEnabled failing to compile
Ignoring Android Studio configuration
Adding gradle wrapper and configuration
Merge remote-tracking branch 'origin/develop' into gradle
Removing duplicate colors
updating dependencies

- Android-PasscodeLock https://github.com/wordpress-mobile/Android-PasscodeLock
- GraphView https://github.com/wordpress-mobile/GraphView
- AndroidSlidingUpPanel https://github.com/umano/AndroidSlidingUpPanel
- drag-sort-listview https://github.com/bauerca/drag-sort-listview
fixing up a couple more 9 patch images