Tests with descriptors from USB-C to 3.5mm adapter in four cases:
- line level load connected, no microphone
- low impedance load with microphone
- low impedance load without microphone
- no load attached.
Test: Ran tests without fix for bug 73813676, failed.
Ran tests with fix, all passed.
Change-Id: I067a15a122996e80c70bf287c6982611b6deee01