audio: Fix update of an existing patch

The code for updating the existing patch did not modify
the patch stored in the module's list of patches.

Added a test which switches the patch to another port
config and validates that 'Module.getAudioPatches' returns
the updated patch.

Bug: 302573756
Test: atest VtsHalAudioCoreTargetTest
Change-Id: I0e3412b9387cd451436a48af116dc5a940d868cf