Skip on_common_connection after disarm le connection state machine

On common connection complete does two things:
1. Disables timer for the new connection if direct connection
2. Removes device from connections awaiting adverts

When the le connection state machine is disarmed by OnPause(),
neither of these conditions are true and may be skipped.

Bug: 213937853
Tag: #refactor
Test: gd/cert/run
BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines

Change-Id: I5be0784d0cb5d541fd3e794d541b05693a5c1999