NullPointerException in CameraFragment

Running non-modified camera2.basic sample on emulator, capturing image by "Front JPEG" camera.

```
Process: com.android.example.camera2.basic, PID: 2662
java.lang.NullPointerException
at com.example.android.camera2.basic.fragments.CameraFragment.getFragmentCameraBinding(CameraFragment.kt:79)
at com.example.android.camera2.basic.fragments.CameraFragment.access$getFragmentCameraBinding(CameraFragment.kt:74)
at com.example.android.camera2.basic.fragments.CameraFragment$animationTask$2.invoke$lambda-1$lambda-0(CameraFragment.kt:117)
at com.example.android.camera2.basic.fragments.CameraFragment$animationTask$2.$r8$lambda$kSaIYQrPru2VxvpYHL5tPwU4w3s(Unknown Source:0)
at com.example.android.camera2.basic.fragments.CameraFragment$animationTask$2$$ExternalSyntheticLambda1.run(Unknown Source:2)
at android.os.Handler.handleCallback(Handler.java:938)
```

```
class CameraFragment : Fragment() {
/** Android ViewBinding */
private var _fragmentCameraBinding: FragmentCameraBinding? = null
>>> private val fragmentCameraBinding get() = _fragmentCameraBinding!!
```

Luckily Kotlin has !! operator that can be used to get NPE even in Kotlin code :)

Start in CameraFragment.kt around the fragmentCameraBinding getter at line 79 and animationTask around line 117. Reproduce the crash by capturing an image with the emulator's "Front JPEG" camera, then trace why the binding is unavailable when the animation runs. Done means that capture no longer produces the reported NullPointerException.

Written by the indexing model from the issue text.