[1/2] base: allow disabling call end sound

Change-Id: I4e5942de5c61dab9ee59cbf3b6599af32edb1d47
Merge "[1/2] base: allow disabling call end sound" into android-4.4
base: ActiveDisplay: fix for disappearing notification bar

What a derp
http://jira.omnirom.org/browse/OMNI-158
http://jira.omnirom.org/browse/OMNI-101

PS2
dont do it on secure lockscreens

PS4
check if lookscreen is enabled

Change-Id: Idf7fd7c15fcd87e2efb62f0a234e15f1df1921e8
Merge "base: ActiveDisplay: fix for disappearing notification bar" into android-4.4
Merge remote-tracking branch 'omni/android-4.4' into omni-4.4