[1/2]Base: Option to hide Adb notification icon

Settings: https://gerrit.omnirom.org/#/c/2933/

Change-Id: I5353b76797ec1e4c53bd6fe014f4ef9b6a7f3936
Merge "[1/2]Base: Option to hide Adb notification icon" into android-4.4
Merge remote-tracking branch 'cm/android-4.4' into android-4.4