Set calling ownerinfo for outbound connection service RPCs.

For all outbound calls from Telecom into the connection service, ensure
we specify an originating package abbreviation as part of the external
session info.

Also, cleaned up the debug-level logging in ConnectionServiceWrapper to
use the same package abbreviations we're now using elsewhere.

Test: Manual testing of connection manager logging.
Bug: 153899641
Change-Id: I63a2520402a13a31fcb7f559f8328466316d9603