alsa : check for valid verb index

- Check for valid verb index before indexing into the use case list
- This is to prevent an invalid lookup with a verb_index value of -1

Change-Id: I4676bd0c9b00364c185e77120744b39d8a675acb
CRs-Fixed: 436857
Update copyright to The Linux Foundation

Change-Id: I482b7fd6b5502b86ca095a1b7bce4f03c10c9304
 Fix for MT call ringtone on USB headset

- Issue:when usb headset connected MT call ringtone heard
  only on speaker and expected behaviour is ringtone should
  be heard on both speaker and usb headset.
- Fixed by defining combo device usb proxy rx speaker

Change-Id: I0474651ed6fa40636038dcd7b25c7962cecc7239
CRs-Fixed: 443227