Use GTEST_SKIP in bcradio AIDL HAL VTS

Use GTEST_SKIP in bcradio AIDL HAL VTS so that the tests with
assumption failed are ignored instead of passed.

Bug: 315344807
Test:  atest VtsHalBroadcastradioAidlTargetTest

Change-Id: Ie170b9ed301f0183e8a4b83e53160674b900b658
1 file changed