SL4A: Throw exception when test fails and clear paired devices am: 438d0afe

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/18751374



Change-Id: Ic397f55a3a982cbea740751a1be926a3f300aa60
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>