Merge changes I9f667570,I056a3fdc,I685a3220,I81cdee3a,I7e053cff

* changes:
  Properly use tHCI_STATUS and hci error code equivalence
  Use proper stack/btm/btm_sec::btm_status_text
  gd: Include hci handle in unsuccessful mode change event
  Use proper bta/gatt/bta_gattc_act::gatt_disconnection_reason_text
  Add gatt_disconnection_reason_text