Fix tuning race condition in broadcast radio VTS am: c60c4658c3 am: 1772d1b008 am: ccfd0d5015

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3417146

Change-Id: I8fa355fe59eab95922e33fe4914fad6e5945f6c8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>