Merge "Revert "Delete bluetooth.h"" am: 0763f1b968

Original change: https://android-review.googlesource.com/c/platform/hardware/libhardware/+/2594895

Change-Id: I5f59a468538a090e0dcca5a3ab3b13e8a4f488bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>