Audio: Add VTS tests for invalid enum-strings, Part 3

Add checks for rejection of invalid port configs.
Fix the default implementation to pass the tests.

Clarified that patch-related operations in IDevice
are optional.

Bug: 142480271
Test: atest VtsHalAudioV6_0TargetTest
Test: atest VtsHalAudioV7_0TargetTest
      with side-loaded V7 default wrapper
Change-Id: I08e85d4883938b4d8f3c411be9fb1bd597eea0c2