cm: Update default wallpaper for sw600dp/sw720dp devices

Change-Id: I99bd1f7d7f735279a5c3e0e7d54220f5f647644e
Merge "cm: Update default wallpaper for sw600dp/sw720dp devices" into cm-11.0
Add OmniSwitch into the build

Change-Id: I32a4b003688607727a56cc172637e37bd4576e3e