Audio HAL V7.1: Update VTS

Mechanical updates from global greps. Updated test code
to use new methods from V7.1.

Added missing checks for null pointers in
PcmOnlyConfig...StreamTest::releasePatchIfNeeded for V7.

Bug: 214426419
Test: atest VtsHalAudioV7_1TargetTest
Change-Id: Id3a99993bf2ee0c87d44f668d759f7c10db9a435