Added Quiet Hours Ringer option (1/3)

Fix for: QuietHours: Change Logic (1/2)

Makes sense to me that turning QuietHours
    on should TURN QUIET HOURS ON with
    default time constraints applied.

I.E. QuietHours between 12:00am && 12:00am
    means QuietHours all day.  Having to
    adjust end time to 11:59 is redundant
    and not exactly the clearest implementation.
    Especially when we have a QuickToggle that
    directly toggles the setting on/off.

Change-Id: I7f3cbe0fb48c658371ebeb0f10c121ce151bdb8c
Signed-off-by: Noah Greene <chevycam94@gmail.com>
Signed-off-by: scotthartbti <scott@ubuntu.com>

Conflicts:
	src/com/android/phone/Ringer.java
Phone: Incoming Call in Background

Allows user to set that Incoming Call UI will remain in background
if screen is on. Instead, a notification is added to StatusBar, which
can be used to bring up the Incoming Call UI. Ringtone and vibration
still occur as per system settings.

This has the same effect as apps marked as "immersive". It prevents
the incoming call from backgrounding the current activity.

PS 2: minor fix

Change-Id: Ib98dd74268826d511ce43ac75dd9dd66f774c9e7
Signed-off-by: scotthartbti <scott@ubuntu.com>

Conflicts:
	res/values/strings.xml