Merge changes Ie0f33c90,I683d6803,I908ff98f,I0a6c26c9,I392dac8b, ...

* changes:
  Re-log stack/btm/btm_ble_gap::btm_ble_read_remote_features_complete
  Move btm_ble_increment_link_topology_mask l2c=>btm
  Streamline conditional stack/btm/btm_ble::btm_ble_connected
  enum-ify tL2CAP_LE_RESULT_
  Add api around select fields tL2C_CB::tL2C_LCB::
  enum-ify stack/include/l2c_api::L2CAP_PRIORITY_