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

bta: Use proper api to reset control block bta::test::bta_disc_test am: 834a62c3 am: 61ec50c6 am: 1184a3da

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



Change-Id: I697a27bc292e7b5aa3fa7da8fe041cb2de8fb5bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>