Merge "[Invisalign2] make enc_handle public and remove friends" into main

  *****************************************************/

  tBTM_SEC_DEVCB devcb;

 private:

  friend void btm_ble_ltk_request_reply(const RawAddress& bda, bool use_stk,

                                        const Octet16& stk);

  friend tBTM_STATUS btm_ble_start_encrypt(const RawAddress& bda, bool use_stk,

                                           Octet16* p_stk);

  friend void btm_ble_ltk_request_reply(const RawAddress& bda, bool use_stk,

                                        const Octet16& stk);

  uint16_t enc_handle{0};

  friend void btm_ble_ltk_request(uint16_t handle, uint8_t rand[8],

                                  uint16_t ediv);

  BT_OCTET8 enc_rand; /* received rand value from LTK request*/

  uint16_t ediv{0};   /* received ediv value from LTK request */

  uint8_t key_size{0};

 public: