hal: Update TX capabilities when adding USB output device as well.

Currently USB TX capability is only updated when input device is
connected. Check USB TX capabilities when the output device as well
to avoid unnecessary device switch between USB-headset and USB-headphone.

CRs-Fixed: 2403502
Change-Id: I4caf3a967c8da7f6eebe4a5ac8d41a3d314a26d9
1 file changed