Merge "Only show collapse handle when the bottom widgets picker is scrollable" into sc-dev am: 1b28e6d40a am: ddada389f7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14453618

Change-Id: I2f091b703b438c08ed8fc111a05932bc1857f9f4

res/layout/widgets_bottom_sheet_content.xml

@@ -15,10 +15,12 @@
 -->
 <merge xmlns:android="http://schemas.android.com/apk/res/android">
     <View
+        android:id="@+id/collapse_handle"
         android:layout_width="48dp"
         android:layout_height="2dp"
         android:layout_gravity="center_horizontal"
         android:layout_marginBottom="16dp"
+        android:visibility="gone"
         android:background="?android:attr/textColorSecondary"/>
     <TextView
         style="@style/TextHeadline"

src/com/android/launcher3/widget/WidgetsBottomSheet.java

@@ -118,6 +118,7 @@ public class WidgetsBottomSheet extends BaseWidgetSheet implements Insettable {
             ViewGroup.LayoutParams layoutParams = widgetsTableScrollView.getLayoutParams();
             layoutParams.height = mMaxTableHeight;
             widgetsTableScrollView.setLayoutParams(layoutParams);
+            findViewById(R.id.collapse_handle).setVisibility(VISIBLE);
         }
     }