FileDisplayActivity: fix coordinator scrolling when opening share details from media preview

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -107,11 +107,11 @@ import com.owncloud.android.ui.helpers.UriUploader;
 import com.owncloud.android.ui.preview.PreviewImageActivity;
 import com.owncloud.android.ui.preview.PreviewImageFragment;
 import com.owncloud.android.ui.preview.PreviewMediaFragment;
-import com.owncloud.android.ui.preview.pdf.PreviewPdfFragment;
 import com.owncloud.android.ui.preview.PreviewTextFileFragment;
 import com.owncloud.android.ui.preview.PreviewTextFragment;
 import com.owncloud.android.ui.preview.PreviewTextStringFragment;
 import com.owncloud.android.ui.preview.PreviewVideoActivity;
+import com.owncloud.android.ui.preview.pdf.PreviewPdfFragment;
 import com.owncloud.android.utils.DataHolderUtil;
 import com.owncloud.android.utils.DisplayUtils;
 import com.owncloud.android.utils.ErrorMessageAdapter;
@@ -1646,6 +1646,9 @@ public class FileDisplayActivity extends FileActivity
      */
     public void showDetails(OCFile file, int activeTab) {
         User currentUser = getUser().orElseThrow(RuntimeException::new);
+
+        resetHeaderScrollingState();
+
         Fragment detailFragment = FileDetailFragment.newInstance(file, currentUser, activeTab);
         setLeftFragment(detailFragment);
 
@@ -1654,6 +1657,8 @@ public class FileDisplayActivity extends FileActivity
     }
 
     private void resetHeaderScrollingState() {
+        CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) findViewById(R.id.root_layout).getLayoutParams();
+        params.setBehavior(new AppBarLayout.ScrollingViewBehavior());
         AppBarLayout appBarLayout = findViewById(R.id.appbar);
 
         if (appBarLayout != null) {