Fixes for Omni SGS builds
Add dalvik-cache to selinux context
aries-common: enable zRAM by default through script

Settings are identical to CM11 default

Change-Id: Ia99b3c23289f6d200b36271915b59d0bf447b7da

Conflicts:

	device_base.mk
Disable screenrecord option

Change-Id: I9c339b2289857831b20e5fb6fedde1f95dc19049