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

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

Change-Id: I661be11efa57a9b19495da32d1522bc05e3d7789
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>