Root-Canal: Generate LE_Channel_Selection_Algorithm event

The 5.2 specification states in Section 7.7.8.66 that the
LE_Channel_Selection_Algorithm event shall be sent
immediately following the LE_Enhanced_Connection_Complete
event when the connection is created by the command
LE_Extend_Create_Connection.

The PTS tool relies on this behaviour to run LE Audio tests.

Test: run VCS PTS tests against Eiffel
Change-Id: I6649a24633b3e715e1ff9eb917c03862c64d1c9f