Fully implement VirtualDevice#hasCustomAudioInputSupport

Take into account all registered audio policy mixes. If any recording
mixes are attributed to the VDs device ID and the device audio policy
is custom the device has a mic.

Bug: 291737188
Test: atest VirtualAudioTest
Change-Id: I578d72f9137711861e6c83269de32d34c06fb90a
4 files changed