Fix tuning race condition in broadcast radio VTS am: c60c4658c3

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

Change-Id: I701ccfe1f9b1489fa2c2ddbb08926a26c92b4dc4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>