Revert "Complete hard removal of BluetoothHeadset#setPriority system API that"

This reverts commit 7407887e0005af63add9aec07242094da5515bd2.

Bug: 209335798
Test: Manual
Reason for revert: Failing signature test that will be updated by paulduffin@

Change-Id: I9de1b07f2d0f4d01d9e3b57a6ddf8a4232db29b6
2 files changed