audio flinger: fix sink metadata for telephony software patches

Make sure the proper sink metadata are sent to audio HAL on the capture
stream when a software audio patch is used for telephony between two
audio HAL modules.

Also fix a bug in audio policy manager where the HW audio source client
used for the telephnoy TX patch was specifying a capture source
instead of playback usage in its audio attributes.

Bug: 249808607
Test: disable LE Audio offload and place a call.
Change-Id: Ic9f7dc75a732e4e404fa0b200b6ee2b34f0690df