Adding support for video state and local/remote video capability
exchange from telephony to telecomm.

Added listener in TelephonyConnection which listens to changes to
the video state and local/remote video capabilities, and sets these
on the underlying telecomm.Connection.

Bug: 16285417
Bug: 16013178
Change-Id: Ib5ae2445fae52f2edc42f27ce7ae62d6e953becb
1 file changed