base: fix enable/disable of notification light

http://jira.omnirom.org/browse/OMNI-86

Change-Id: I1a252c2553462302e416517288bb944de1558956
Merge "base: fix enable/disable of notification light" into android-4.4
frameworks/base: Fix USB media removed notification to be dismissable

Cleanly removing a USB media after unmounting leaves a permanent notification.
This fix makes it dismissable.

Change-Id: Ib6fb77f9ebfb15a60c5c29d10d3090feebc881df
Merge remote-tracking branch 'omni/android-4.4' into omni-4.4