HCI: Use AddressWithType in various LE connection APIs

* Use AddressWithType object to ease object management and hashing
* Track classic and LE pending connections separately in AclManager
* Report peer resolvable address in LE enhanced connection complete
  event if it is not empty

Bug: 138261114
Test: bluetooth_test_gd
Change-Id: I2bea155485a5bdc3d087336c6276952f3d64f0ac