[2/2] Lockscreen Notifications

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

Change-Id: I32e3d79a6c7198e66c302d751b50341da6466ff7

Conflicts:
	res/layout/dialog_color_picker.xml
	res/values/custom_dimens.xml
	res/values/custom_strings.xml