[2/2] OmniGears: Lockscreen Notifications

Base: https://gerrit.omnirom.org/#/c/5734/

PS15:
-use our color picker

PS16:
-use our seekbar
-rework some strings

Change-Id: I32e3d79a6c7198e66c302d751b50341da6466ff7

Conflicts:
	res/values/custom_strings.xml
Merge branch 'jey' into android-4.4