fb: slightly adjust navigationring background drawable size

for custom icons to fit the system icons

Change-Id: I068cd0a463484f0f1b3ed0f210701290be364b7a
fb: fix possible NPE on back button transition

Change-Id: Ia6e30a9d94f292e7616b846f159b61fed9f502cc
fb: refactor QuietHours code

thanks to ivisiblk for the idea

Change-Id: I56e2b4a1945a4b93251b9937b701c86168b732b4
Quiet Hours Ringer (2/3)

Change-Id: Id58ffb24f0d0d57d8446265c899ec4124fe00c70
Merge "fb: slightly adjust navigationring background drawable size" into kk4.4
Merge "fb: fix possible NPE on back button transition" into kk4.4
Merge "fb: refactor QuietHours code" into kk4.4
Merge "Quiet Hours Ringer (2/3)" into kk4.4