DO NOT MERGE Add ability to specify video state through TestInCallService intent.

TestInCallService has an "ACTION_SEND_UPGRADE_REQUEST_FROM_TEST_INCALL_SERVICE"
intent.
Added support to specify an int videoState as part of the intent so that
the caller can test sending video requests that our InCall may not
support (e.g. incoming 1-way request when in audio-only).

Bug: 20090022
Change-Id: I283575cc296444bbdadcdec5c1caa1593c1eed3b