aries-common: allow bdaddr_read to write bluetooth prop

Fixes SELinux perission denial resulting in random bluetooth MAC.

avc:  denied  { set } for property=bt.bdaddr_path scontext=u:r:bdaddr_read:s0 tcontext=u:object_r:default_prop:s0 tclass=property_service

Change-Id: Ibdb11ff8f9e5ec5073dfa65a2075105c4898a2e6
aries-common: use KitKat zRAM setting

CM's compcache has been removed, so we need to migrate to KitKat's
mechanism. The value is set to 64 MB for now, which is approximately
equal to the old 18% setting.

Change-Id: Ib780aed8c336cea5baf0f672e41179ef85790061
aries-common: increase zRAM to 128 MB

This gets compressed to ~40 MB on RAM and may provide benefits
to multitasking.

Change-Id: I160385223256df2b04cc6febe16167a87503d7ab
aries-common: fix device encryption

LVM /dev/mapper/* devices need to be manually labelled

Change-Id: I6e6c765890974c33fe841007764dfe97078811df