[2/2]Settings: Option to hide Adb notification icon

Base: https://gerrit.omnirom.org/#/c/2934/

Change-Id: I3ac5f08a077e04dade4bdeed58442043a8fb5d23
Merge branch 'android-4.4' of https://github.com/omnirom/android_packages_apps_Settings into android-4.4