audioserver: Initialize services before making public.

This avoids inconsistencies and TimeCheck aborts when
the AudioFlinger interface is made public before
AudioPolicy is initialized.

Test: boot, check logcat, kill audioserver, check logcat
Bug: 240234432
Bug: 262821105
Change-Id: I2259105eb86110fafe4e3d7ba5820f6557382447
3 files changed