Apply advertising requests once BLE becomes active

A component that requests advertising during setup does so before the stack is
up, so the request had no effect until something else restarted advertising.
Refresh on the transition to active so early requests, and requests still held
across a disable/enable cycle, take effect right away.

esphome/components/esp32_ble/ble.cpp

@@ -592,6 +592,10 @@ void ESP32BLE::loop_handle_state_transition_not_active_() {
     }
 
     this->state_ = BLE_COMPONENT_STATE_ACTIVE;
+#ifdef USE_ESP32_BLE_ADVERTISING
+    // Requests made before the stack was up (or before it was re-enabled) take effect now
+    this->advertising_refresh();
+#endif
   }
 }