Merge "AudioDeviceInventory: fix devices role cache purge." into udc-dev am: 10639c55 am: 212310f4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23492176



Change-Id: I9e46489b73f519cb39fcf40b614e58b1c7664337
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>