gdx: Introduce module_mainloop extension am: 685b43ed

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2853215



Change-Id: I9e642e759de7c0548597f11a08717959ed46971d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>