audio policy: optimize preferred device selection am: 72af8011 am: 8a537f2c am: 785da99f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/22242942



Change-Id: Ie3fa30a024227cf11e8afd7187c2b410ed2509ba
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>