Add assisted dialing logic to Telephony Connections.

Currently, we propogate the assisted dialing property
if we detect that the client requested assisted dialing. This
is because the client is currently responsible for assisted dialing
and only passes along the request if it was successful.

Test: manual
Bug: 35963245
Change-Id: I0811fd64a15675e7b4f34963189f0fe4688ae277
Merged-In: I6897554761b43449b3619747663866ff79b504ec
2 files changed