fix(usb_device_uac): enforce MIC_INTERVAL_MS pacing to avoid usb_mic_task overrun

usb_device_uac: Throttle usb_mic_task to match MIC_INTERVAL_MS

The usb_mic_task previously ran in a tight loop, pulling audio data as fast as possible.
This caused USB audio to exceed the expected data rate, leading to glitches and distorted output.
It also triggered the task watchdog due to lack of blocking.

This patch introduces vTaskDelayUntil() to enforce the configured MIC_INTERVAL_MS rate,
ensuring correct USB audio pacing and RTOS compliance.

Author: Ziamor

components/usb/usb_device_uac/usb_device_uac.c

@@ -456,10 +456,12 @@ static void usb_spk_task(void *pvParam)
 #if CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX
 static void usb_mic_task(void *pvParam)
 {
+    TickType_t xLastWakeTime = xTaskGetTickCount();
     while (1) {
         if (s_uac_device->mic_active == false) {
             // clear the notification
             ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
+            xLastWakeTime = xTaskGetTickCount();
             continue;
         }
         // clear the notification
@@ -479,6 +481,8 @@ static void usb_mic_task(void *pvParam)
             s_uac_device->mic_data_size = bytes_read;
             UAC_EXIT_CRITICAL();
         }
+
+        vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(MIC_INTERVAL_MS));
     }
 }
 #endif