Merge "Revert "Delete bluetooth.h"" am: 0763f1b968 am: 2ef70764b0 am: 4068f4c3dc am: 0cb9c5663b am: 4223c383bf am: 2bc3bc978f

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

Change-Id: Idfbf1c1e4e01ad3d780c13fa46695382ffd96f49
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>