Increase log level for VideoProviderProxy, add connection event logging.

Increased log level for VideoPRoviderProxy to info (this is not a very
chatty API) to aid test team; this is primarily to expose the sesssion
events -- I didn't see a value of putting these in the regular telecom
event logs.
Added Connection Event logging in the telecom event logging.

Bug: 31199425
Change-Id: I33ac8a67ae6c4a16c26a6c3d0ccf696735e730bb