radio: Split earpiece/speaker call paths

These apparently need different values in order to work properly

Change-Id: I5c3805ba4996782ffd095279c6860fc85eac8138
audio: Reduce the amount of filtering in DL2

And bring down the volume a bit to compensate
Change-Id: I1dafa28b6b8887412107a48244c60084205605db
 init: Run pvrsrvinit right after the fs setup

This needs to be done as soon as possible to avoid race conditions
with zygote

Change-Id: Ice8330db9f882d44a54ac940f3adced008a6353f
selinux: Add device-specific rules

Change-Id: I69952d49ef0b48d634debc5ac5bc7c2eeea23903
Remove pointless clause

This condition didn't do anything and was misleading, SEPOLICY variables
are only relevant when selinux is built in the first place

Change-Id: I423cf0e5b04fd9e92f4cc9c33d13d4875c9aafc6