aaudio: return error code when sample rate rejected

This will prevent us from trying to configure the
FlowGraph with invalid parameters.

The bug occurs when media_audio >> Enable Sample Rate Conversion
flag is turned off.

Bug: 316971461
Test: See bug for repro steps.
Test: If fixed then you should not see the message:
Test: Channel reduction not supported.
Change-Id: I886d334e2b04a8df71e1e8e67498caa3efc9d7cc