Merge "Audio VTS: Always check for Result::isOk()" into pie-vts-dev

am: 2070f8b0b8

Change-Id: Ibf74dbc43a0e91121752bc1fd2e48ee534cb7f4e

audio/core/4.0/vts/functional/AudioPrimaryHidlHalTest.cpp

@@ -1402,6 +1402,7 @@ TEST_F(AudioPrimaryHidlTest, setBtHfpVolume) {
         "Make sure setBtHfpVolume is either not supported or "
         "only succeed if volume is in [0,1]");
     auto ret = device->setBtHfpVolume(0.0);
+    ASSERT_TRUE(ret.isOk());
     if (ret == Result::NOT_SUPPORTED) {
         doc::partialTest("setBtHfpVolume is not supported");
         return;