Revert "p3100: remove DeviceSettings" and integrate into OmniROM

This reverts commit 5b29f84146d6af2f9bb6cfb788e658d563c37dea.
Update ActionBar to fit KitKat's theme (adapted from i9100g)
Update Copyright notices

Change-Id: I3ca3b50c403f11bb9fcf12aef23dd8193fc36b02