Merge changes I333524dc,Ia460804d,I90cfe69e,I848e344b,Ie9108602, ...

* changes:
  Add read_own_addres to PyHal
  Simplify ACL connection components of DirectHciTest
  Add send_acl_first to PyHal, to simplify redundancy
  Fold ACL sending into PyHal
  Simplify ACL sending in SimpleHalTest
  Add shortcut for enabling inquiry in PyHal
  Simplify DirectHciTest send_hal_acl_data
  Add HciMatchers.LoopbackOf to avoid imprecise matching
  Improve signal to noise in DirectHciTest
  DirectHciTest, remove send_hal_hci_command
  Improve hci facade proto