IMA extension: catch WebView exceptions

### ExoPlayer Version

2.15.1

### Devices that reproduce the issue

All devices which does not have WebView or disabled it

### Devices that do not reproduce the issue

_No response_

### Reproducible in the demo app?

Yes

### Reproduction steps

Play samples with ads using ima extension

### Expected result

When WebView is not available, we expect player to skip the ads, since WebView is only needed for playing ads and not the actual video.

### Actual result

Playback crashed with the exception `android.util.AndroidRuntimeException: android.webkit.WebViewFactory$MissingWebViewPackageException: Failed to load WebView provider: No WebView installed`

### Media

Not applicable

### Bug Report

- [ ] You will email the zip file produced by `adb bugreport` to dev.exoplayer@gmail.com after filing this issue.