[automerger skipped] Add AudioAttributes and AudioFlag for use in HAL...

[automerger skipped] Add AudioAttributes and AudioFlag for use in HAL interface for engine configuration. am: cd5387e2 am: 2dea99e0 am: 99805655 -s ours

am skip reason: Merged-In I481d4b4e7b4f1302d508ab6eb2c7ed4336a8f801 with SHA-1 6088f4b7 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19874108



Change-Id: I0d19d0e4fbacd5fad769318b99c131c673703ee3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>