[2/2] Settings: Disable safe headset volume warning

Base: https://gerrit.omnirom.org/#/c/5201/

PS4
adjust default value

PS5
-minor string change
-update also the volume adjust sound summary
which was wrong for a long time :)

Change-Id: I60d62b6bc182afb731d15c7e55220fc283e7f082
merge changes from Omni 4.4 into local branch

Conflicts:
	res/values/custom_strings.xml

Change-Id: I6b86e810ac61556e382f94b62d28260d7826a013
Lockscreen Notifications: Custom background color [2/2]

Change-Id: Id03048c52fc2107260faf545c93157c51381e2ff