Empty game (no logic) has 50% CPU usage and low FPS (40+ instead of 60) on iOS

## Bevy version

Tested on both 0.14.2

## \[Optional\] Relevant system information

Tested on
* iPhone 16 Simulator
* iPhone 13

If your bug is rendering-related, copy the adapter info that appears when you run Bevy.

```ignore
AdapterInfo { name: "Apple A15 GPU", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }
```

## What you did

I setup a bare minimum project to demonstrate the issue https://github.com/80gen/bevy_ios_bug/tree/cpu_high

## What went wrong

The game logic doesn't have anything, not even a camera setup, see https://github.com/80gen/bevy_ios_bug/blob/cpu_high/crates/game/src/lib.rs

When running the game on desktop (in my test it's Macbook Pro M1), it looks fine, with CPU usage at 10%. No error log.

But when the game run in either iOS Simulator or physical phone, the CPU usage stay above 50% and FPS average at 40 (should be 60).

Here is a screenshot from the XCode debugger

The XCode terminal is showing the following log
```
AdapterInfo { name: "Apple iOS simulator GPU", vendor: 0, device: 0, device_type: DiscreteGpu, driver: "", driver_info: "", backend: Metal }
AddInstanceForFactory: No factory registered for id F8BB1C28-BAE8-11D6-9C31-00039315CD46
Failed to start Gilrs. Gilrs does not support current platform.
processing non `RedrawRequested` event after the main event loop: AboutToWait
Creating new window "App" (0v1#4294967296)
`WindowAttributes::min_inner_size` is ignored on iOS
`Window::theme` is ignored on iOS
processing non-`RedrawRequested` event after the main event loop: WindowEvent {
window_id: WindowId {
window: 0x0000000105a9fd30,
},
event: Focused(
true,
),
}
processing non-`RedrawRequested` event after the main event loop: WindowEvent {
window_id: WindowId {
window: 0x0000000105a9fd30,
},
event: Resized(
PhysicalSize {
width: 3840,
height: 2160,
},
),
}
processing `RedrawRequested` during the main event loop
processing non `RedrawRequested` event after the main event loop: AboutToWait
"finished frame" tracy.frame_mark=true
processing `RedrawRequested` during the main event loop
processing non `RedrawRequested` event after the main event loop: AboutToWait
"finished frame" tracy.frame_mark=true
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
processing non `RedrawRequested` event after the main event loop: AboutToWait
"finished frame" tracy.frame_mark=true
```

And this line get repeated infinitely
```
2024-12-09T23:09:26.510999Z  WARN winit::platform_impl::ios::app_state: processing non `RedrawRequested` event after the main event loop: AboutToWait
2024-12-09T23:09:26.513511Z  WARN winit::platform_impl::ios::app_state: processing non `RedrawRequested` event after the main event loop: AboutToWait
```