usb: Hub Driver and USBH recover port automatically after disconnection

This commit updates the Hub Driver and USBH as follows:
- Updated communication mechanism between Hub Driver and USBH
    - USBH notifies the Hub Driver via Hub request callback (usbh_hub_req_cb_t)
    - Hub Driver notifies the USBH via usbh_hub_pass_event()
- Hub Driver now defers all event handling to hub_process.
- Hub Driver and USBH will now automatically recover the port after a disconnected
    device has been closed.
- Fixed incorrect assert in usbh_dev_close()

components/usb/test/usb_host/msc_client_async_enum.c

@@ -28,9 +28,12 @@ Implementation of an asynchronous MSC client used for USB Host enumeration test.
     - Check the device and configuration descriptor of the device
     - Check the device's information
     - Close device
+    - Repeat for multiple iterations from waiting connection by forcing a disconnection
     - Deregister MSC client
 */
 
+#define TEST_ENUM_ITERATIONS   3
+
 typedef enum {
     TEST_STAGE_WAIT_CONN,
     TEST_STAGE_DEV_OPEN,
@@ -90,6 +93,7 @@ void msc_client_async_enum_task(void *arg)
 
     bool exit_loop = false;
     bool skip_event_handling = false;
+    int enum_iter = 0;
     while (!exit_loop) {
         if (!skip_event_handling) {
             TEST_ASSERT_EQUAL(ESP_OK, usb_host_client_handle_events(msc_obj.client_hdl, portMAX_DELAY));
@@ -101,6 +105,10 @@ void msc_client_async_enum_task(void *arg)
         msc_obj.cur_stage = msc_obj.next_stage;
 
         switch (msc_obj.cur_stage) {
+            case TEST_STAGE_WAIT_CONN: {
+                //Wait for connection, nothing to do
+                break;
+            }
             case TEST_STAGE_DEV_OPEN: {
                 ESP_LOGD(MSC_CLIENT_TAG, "Open");
                 //Open the device
@@ -154,7 +162,16 @@ void msc_client_async_enum_task(void *arg)
             case TEST_STAGE_DEV_CLOSE: {
                 ESP_LOGD(MSC_CLIENT_TAG, "Close");
                 TEST_ASSERT_EQUAL(ESP_OK, usb_host_device_close(msc_obj.client_hdl, msc_obj.dev_hdl));
-                exit_loop = true;
+                enum_iter++;
+                if (enum_iter < TEST_ENUM_ITERATIONS) {
+                    //Start the next test iteration by disconnecting the device, then going back to TEST_STAGE_WAIT_CONN stage
+                    test_usb_set_phy_state(false, 0);
+                    test_usb_set_phy_state(true, 0);
+                    msc_obj.next_stage = TEST_STAGE_WAIT_CONN;
+                    skip_event_handling = true; //Need to execute TEST_STAGE_WAIT_CONN
+                } else {
+                    exit_loop = true;
+                }
                 break;
             }
             default: