apps: log_processor: Update Service connection regex

CL:1919430 modifies how Shill logs Service connection events. Update
the regex here to continue matching that event.

BUG=b:144542514
TEST=Run logs after CL:1919430 through the log tool and see that
     Service connect events are being highlighted.

Cq-Depend: chromium:1919430
Change-Id: Ic295610c94a216801ec46e25a5e505e8064fd935
1 file changed