Settings: Lockscreen Colors and Lock Image [2/2]

PS2: Separate settings into mutiple and
	create fragment to hold them
PS3: String change.
PS?: Lock image selector
PS?: Custom Lock-image colorize option
PS4: Add missing "strings"
PS5: Forgot 1 additional string

Change-Id: I46bb16570916645712b75c05f34235fdbd271650