Merge "audio HAL: Support for external device connections" am: eefac18b26 am: 62be00231e am: ea913efbd4

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2194135

Change-Id: Ic76d09389b5dd4ccc2004fdc2d17133a7518ec49
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>