[automerger skipped] Fix a null pointer access in Tuner VTS am: 517aab51c9 -s ours

am skip reason: skipped by user dmulabagal

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1727850

Change-Id: I5666645ca285225acae487e8e2e9c5c2c1864121