m8: Update audio configuration

 * Correct audio_policy, use low latency primary

Change-Id: I439137898434695e2528356718f18b67f0cb1c2c
m8: Update asserts

 * Installing is a nice thing!
 * Rename sprint to htc_m8whl

Change-Id: Ia2960dba6aa09adff63fb8d83e093256431468df