Download later: Make download later dialog view scrollable.

The download later dialog needs to be scrollable. In phone landscape
mode, not all the view is shown.

Bug: 1106363,1078454
Change-Id: Iae8d649b7259fee0a8800aa71e7a14cd759d49e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2301039Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Min Qin <qinmin@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789541}

chrome/browser/download/android/java/src/org/chromium/chrome/browser/download/dialogs/DownloadLaterDialogView.java

@@ -14,9 +14,9 @@ import android.text.style.StyleSpan;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.CheckBox;
-import android.widget.LinearLayout;
 import android.widget.RadioGroup;
 import android.widget.RadioGroup.OnCheckedChangeListener;
+import android.widget.ScrollView;
 import android.widget.TextView;
 
 import androidx.annotation.Nullable;
@@ -33,7 +33,7 @@ import org.chromium.ui.text.SpanApplier.SpanInfo;
 /**
  * The custom view in the download later dialog.
  */
-public class DownloadLaterDialogView extends LinearLayout implements OnCheckedChangeListener {
+public class DownloadLaterDialogView extends ScrollView implements OnCheckedChangeListener {
     private Controller mController;
 
     private RadioButtonWithDescription mDownloadNow;