Revert "Add API for cross device calling."

Revert "Add cts tests for new cross device calling api"

Revert submission 16308056-cross-api

Reason for revert: Don't want to launch this in T now
Reverted Changes:
I731226c0b:Add cts tests for new cross device calling api
I1a3aa6c1a:Add API for cross device calling.
I40f78925b:Implement new TelecomManager API for cross device ...

Change-Id: I687d94235b159d8daa20fe75de08394adc39f8c7