Introduce libbt-jni-thread am: a3ffb7b0 am: a86bada8 am: f0e3f6dc

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2858567



Change-Id: I24fc27125c651c2048edf4191d9a7fdbcf428a52
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>