Merge "Revert "Remove unused hardware/bluetooth.h include"" am: 3ac998fa8c am: 79119d91d0 am: f1c107e68d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2594896

Change-Id: I3ca64c9c9e1162c3f1d4f8f8af225c0e821aafb7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>