Quiet Hours: Allow disabling phone ringer (1/3)

Change-Id: I73746443d1797c0f73a13faea2c422f5759b64a5
Allow changing screen-off animation (1/2)

* Allow enabling/disabling screen-off animation
* Allow selection between fade & crt effects if the device allows it

Change-Id: If6bb9afd7a753e1df013e88f7f39cea94e8fe565