audio_usb: Enable ASRC in USB voice call path

Telephony downlink ASRC should be enabled for USB. See b/173577733.
Otherwise the downlink ring buffer will underflow or overflow

Bug: 199230403
Test: Local build + Telephony test for five minutes: No glitch observed.
Signed-off-by: Roger Fang <rogerfang@google.com>
Change-Id: Ifbcd9252c97a7f794e0b142e69faf1b0f3041098
4 files changed