AclManager::create_le_connection fixes

* modern controllers require "Enhanced" version of Create Connection
Command
* They also require "Set Random Address" to be used before attempting to
create connection
* Use same parameters for connection initiation as the old  stack is using

Test: Attempt to Bond with LE device
Change-Id: I58eb54b4e45f5884a69079421b7a2c6a67b7a2bd