m8: clean up media_codecs.xml

Change-Id: I30baa093f74e359db935b226d122f4a188414d21
sepolicy: add device specific-sepolicies

Change-Id: I1d099f482b157d9b04488048234e987ff488afcb
a5: selinux enforcing
* Add zcache to cmd line

Change-Id: Ic71a00f4466055f2a50e3cbc5634b0f796b1b38b