Merge "AudioDeviceInventory: fix purge of device role cache." into udc-dev am:...

Merge "AudioDeviceInventory: fix purge of device role cache." into udc-dev am: cd5243dc am: 24dff307

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23712844



Change-Id: I9e7a45b826ddcf4bf8e29df75724d80021f01f7b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>