LeAudio: Set communication device when LeAudio is used

Make use of new API to set comunication device when Le Audio has been
chosen.

Tag: #feature
Bug: 159786353
Sponsor: jpawlowski@
test: atest TelecomUnitTest
test: manuall call

Change-Id: Ida3d10d1d088c8a0663b7d3673f2409fa4cc0a53