This CL defines new extras that can be set in a call's intent extras.
These extras track the following:
CALL_CREATED_TIME_MILLIS - the time when the call was created by
telephony (or another connection service)
CALL_TELECOM_ROUTING_START_TIME_MILLIS - the time when telecom
started processing the call
CALL_TELECOM_ROUTING_END_TIME_MILLIS - the time when telecom
finished processing things like call blocking and was ready to
connect to the UI
These extras can be used by the dialer to track how long it takes for
calls to be shown to the user.
Bug: 28202119
Change-Id: I8fca259d449adedaeb4ff91d35bf59a7409be866
da6bb3883f