cleanup config mk files

* NewAudio already inherits PackageElements & Stars
* gsm & cdma mks are no longer used. MAKE SURE YOUR DEVICE DOESN'T
INHERIT THEM!
* bring it down to just phone, tablet & common.

Change-Id: I8c30d39e3339b2a26786baa03d838ad28eeb9ecf

Conflicts:
	config/common_full.mk
	config/common_full_tablet_wifionly.mk