[Bug]: SourceRectHint Animation messes up during PIP restore after `setPictureInPictureParams` in Android 15

### Is there an existing issue for this?

- [x] I have searched the existing issues

### In which area is the issue?

User Interface

### In a specific sample?

PiPMovieActivity.kt

### What happened?

In Android 15 If you first enter Picture-in-Picture mode using `setSourceRectHint`, then call `setPictureInPictureParams` again later—even if `PictureInPictureParams.Builder().build()`—it totally breaks the smooth restore animation based on the original SourceRect.

How to Reproduce :
Add this line into `PiPMovieActivity.kt:297`:
```kotlin
override fun onPause() {
movieView.pause()
setPictureInPictureParams(PictureInPictureParams.Builder().build())
}
```
Then follow: enter PiP → pause and start the video → expand

Check the videos below:

normal:
https://github.com/user-attachments/assets/1db0cc90-ea99-4203-8bbb-1c29cbbc3a2d

error:
https://github.com/user-attachments/assets/69ad386b-84aa-4ab5-a314-89f0a2971330

### Relevant logcat output

```shell

```

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

Start with PiPMovieActivity.kt around line 297 and reproduce the Android 15 flow: enter PiP, pause and start the video, then expand after calling setPictureInPictureParams. Compare the result with the linked normal and error videos; done means restoring from PiP preserves the smooth animation based on the original SourceRect.

Written by the indexing model from the issue text.