Use onStopVideo callback for restoring preview

cameraview/src/main/java/com/otaliastudios/cameraview/engine/Camera2Engine.java

@@ -726,9 +726,8 @@ public class Camera2Engine extends CameraEngine implements ImageReader.OnImageAv
     }
 
     @Override
-    public void onVideoResult(@Nullable VideoResult.Stub result, @Nullable Exception exception) {
+    protected void onStopVideo() {
         boolean wasRecordingFullVideo = mVideoRecorder instanceof Full2VideoRecorder;
-        super.onVideoResult(result, exception);
         if (wasRecordingFullVideo) {
             // We have to stop all repeating requests and restart them.
             try {
@@ -739,6 +738,7 @@ public class Camera2Engine extends CameraEngine implements ImageReader.OnImageAv
                 throw createCameraException(e);
             }
         }
+        super.onStopVideo();
     }
 
     //endregion

cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java

@@ -1188,14 +1188,19 @@ public abstract class CameraEngine implements
             @Override
             public void run() {
                 LOG.i("stopVideo", "executing.", "isTakingVideo?", isTakingVideo());
-                if (mVideoRecorder != null) {
+                onStopVideo();
-                    mVideoRecorder.stop(false);
-                    mVideoRecorder = null;
-                }
             }
         });
     }
 
+    protected void onStopVideo() {
+        LOG.i("stopVideo", "executing.", "isTakingVideo?", isTakingVideo());
+        if (mVideoRecorder != null) {
+            mVideoRecorder.stop(false);
+            mVideoRecorder = null;
+        }
+    }
+
     @CallSuper
     @Override
     public void onVideoResult(@Nullable VideoResult.Stub result, @Nullable Exception exception) {