Component/bt: add attr_handle for ESP_GATTS_CONF_EVT

components/bt/bluedroid/api/include/api/esp_gattc_api.h

@@ -347,7 +347,8 @@ esp_err_t esp_ble_gattc_send_mtu_req (esp_gatt_if_t gattc_if, uint16_t conn_id);
 
 
 /**
- * @brief           This function is called to request a GATT service discovery
+ * @brief           This function is called to get service from local cache. 
+ *                  If it does not exist, request a GATT service discovery
  *                  on a GATT server. This function report service search result
  *                  by a callback event, and followed by a service search complete
  *                  event.

components/bt/bluedroid/api/include/api/esp_gatts_api.h

@@ -120,6 +120,7 @@ typedef union {
     struct gatts_conf_evt_param {
         esp_gatt_status_t status;       /*!< Operation status */
         uint16_t conn_id;               /*!< Connection id */
+        uint16_t handle;                /*!< attribute handle */
         uint16_t len;                   /*!< The indication or notification value length, len is valid when send notification or indication failed */
         uint8_t *value;                 /*!< The indication or notification value , value is valid when send notification or indication failed */
     } conf;                             /*!< Gatt server callback param of ESP_GATTS_CONF_EVT (confirm) */