bta: Use proper api to reset control block bta::test::bta_disc_test am: 834a62c3 am: 61ec50c6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2825172



Change-Id: I9192d691a3cc84a0e2e83cc2f719f02de34d81a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>