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

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



Change-Id: I89f52878493d5905bece4ade7e3e641a5d441895
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>