audio: Populate MicrophoneInfo with vendor data

Added a virtual method Module::getMicrophoneInfos
so that vendor implementations can provide actual
data about device microphones. This information
is not part of the APM config file.

Bug: 205884982
Test: atest VtsHalAudioCoreTargetTestTest
Change-Id: I4b650ae221ba866421bbf8500ad8c17f04bc4aa7