[1/2] Base: Option to enable Notification Light when screen is on

This makes it possible to let the Notification LED flash even when the screen is on

Change-Id: I58be9646cdc84d4765342a5ab45b4641c3d5daba
Base: fix statusbar brightness control gesture

see http://jira.omnirom.org/browse/OMNI-631

Change-Id: Ic4001fb0fc6b7e1fe813d74104e42f7d91351d1a
Merge remote-tracking branch 'omni/android-4.4' into android-4.4