[automerger skipped] audio policy: add audio policy ready flag. am: 39934ead...

[automerger skipped] audio policy: add audio policy ready flag. am: 39934ead am: 1347ba3d -s ours

am skip reason: Merged-In I671ed0aadd0c51342be5b57d1afb7577da6a7fa9 with SHA-1 d66d7a15 is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1980126

Change-Id: Ib935cc1b478ba9da8d9dfa6b35c813f7178b3384