audio: Improve testing of point-to-point connections

Point-to-point connections (analog, HDMI, SPDIF) do not use
a device address. Reflect that in `GenerateUniqueDeviceAddress`.
Add an analog headset into the test configuration.

Bug: 300648357
Test: atest VtsHalAudioCoreTargetTest
Change-Id: Id1d0b1b60df40c2474fe3151067152b8e0a261c3
2 files changed