BluetoothRouteManager: Fix switching between HFP and LeAudio

When switching between devices we need to make sure to close audio
connection in active device before connecting the other one.

Tag: #feature
Bug: 159786353
Sponsor: jpawlowski@
test: switch between HFP and LeAudio during call
Change-Id: Id5adb411557b0437e89775991bf3158fd4fd6ef1