Change notification background from holo to kitkat grey

Credit @Alex-Cruz (Dirty Unicorns)

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	core/res/res/values/colors.xml

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
Let's get rid of more of that JB blue

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>