Use Google's centralized media_codecs.xml parts

Fixes .wav playback
Thanks to pawitp
Use android standardized charger mode instead of lpm.rc

See http://review.cyanogenmod.org/#/c/77926/
Thanks to pawitp
Add Lollipop flags

Thanks to pawitp
Upgrade AudioPolicyManager to new API

Thanks to pawitp
Belated update to init variable syntax

Thanks to pawitp
Switch to dlmalloc

Thanks to pawitp
Increase heapgrowthlimit to 56m

Thanks to pawitp
Update GPS config
Update overlay
Remove unused at* binaries

- atx doesn't seem to do anything and is a pain with SELinux
- at_distributor isn't running since forever due to missing libs

Thanks to pawitp
SELinux policies

Thanks to pawitp
RIL: Remove left over setDataSubscription
Update overlay
BoardConfig: Resort some lines