Mms: Bring back layout color abstraction

Change-Id: Id1845ddad8a38a6f2ece7c9531927cb8fc1ab189
Signed-off-by: Evan Anderson <evan@thelinuxman.us>
Make MMS app colors themeable

Change-Id: If4ef0a43bed08a8f6a2b1cb8f52e37ab69caee6d