CameraView App Crashes on rotation

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Describe the bug

Please add a clear description of what the bug is, and fill the list below.

CameraView version: 2.6.1
Camera engine used: camera2
Reproducible in official demo app: don't know
Device / Android version: Galaxy Note10+ (d2q) (SM-N975U), Android 2.0.1, OS Version 10

To Reproduce

Steps to reproduce the behavior, possibly in the demo app:

Go to Camera Screen
Rotate the device
NullPointerException rised

Expected behavior

Shouldn't crash on rotation

XML layout

Part of the XML layout with the CameraView declaration, so we can read its attributes.

                <com.otaliastudios.cameraview.CameraView
                    android:id="@+id/camera"
                    android:keepScreenOn="true"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:cameraGrid="draw3x3"
                    app:cameraPlaySounds="false"
                    app:cameraMode="picture"
                    app:cameraHdr="on"
                    app:cameraPictureSnapshotMetering="true"
                    app:cameraWhiteBalance="auto"

                    app:cameraEngine="camera2"
                    app:cameraAutoFocusMarker="@string/cameraview_default_autofocus_marker"
                    app:cameraPreview="texture"/>

Logs

java.lang.NullPointerException: Attempt to invoke virtual method 'com.otaliastudios.cameraview.frame.ByteBufferFrameManager com.otaliastudios.cameraview.engine.Camera1Engine.getFrameManager()' on a null object reference

java.lang.NullPointerException: Attempt to invoke virtual method 'com.otaliastudios.cameraview.frame.ByteBufferFrameManager com.otaliastudios.cameraview.engine.Camera1Engine.getFrameManager()' on a null object reference at com.otaliastudios.cameraview.picture.Snapshot1PictureRecorder$1.onPreviewFrame(Snapshot1PictureRecorder.java:84) at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1221) at android.os.Handler.dispatchMessage(Handler.java:107) at android.os.Looper.loop(Looper.java:237) at android.os.HandlerThread.run(HandlerThread.java:67)