Move bt_host_test_bta::bta::bta_av_test => net_test_bta am: e3b6ff65

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2829371



Change-Id: I4653302fa0dfb28cb4246f3e1a8bfa302c2d899b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>