Merge "Initialize local variable in gatts_process_read_by_type_req" into pi-dev

void gatts_process_read_by_type_req(tGATT_TCB& tcb, uint8_t op_code,

                                    uint16_t len, uint8_t* p_data) {

  Uuid uuid = Uuid::kEmpty;

  uint16_t s_hdl, e_hdl, err_hdl = 0;

  uint16_t s_hdl = 0, e_hdl = 0, err_hdl = 0;

  tGATT_STATUS reason =

      gatts_validate_packet_format(op_code, len, p_data, &uuid, s_hdl, e_hdl);