configs: Add voice-handset-tmus path to support tmus operator

voice-handset-tmus is missing in mixer paths of several target
variants due to which voice call on handset doesn't work on tmus
sim operators. Add this path in all the applicable variants to
fix this issue.

CRs-Fixed: 2478385
Change-Id: Ic21186974fd8ffe1cef768252938ff44c078f826