Move padding from parent to WidgetPagedView and siblings in 2-pane pkr

WidgetPagedView seems to rely on padding to position it such that
 talkback doesn't focus on it before sticky header.

Bug: 348107507
Test: With talkback
Flag: EXEMPT bugfix
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:adc171b3136dda72225ad2930604195a3c13122e)
Merged-In: I2fcdc0cbf027a7a8c1bee104f85a61f700faf776
Change-Id: I2fcdc0cbf027a7a8c1bee104f85a61f700faf776

res/layout/widgets_two_pane_sheet_paged_view.xml

@@ -20,16 +20,19 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="start"
-        android:paddingHorizontal="@dimen/widget_list_horizontal_margin_two_pane"
         android:layout_gravity="start"
         android:clipChildren="false"
         android:clipToPadding="false"
         android:layout_alignParentStart="true">
+        <!-- Note: the paddingHorizontal has to be on WidgetPagedView level so that talkback
+         correctly orders the lists to be after the search and suggestions header. See b/209579563.
+          -->
         <com.android.launcher3.widget.picker.WidgetPagedView
             android:id="@+id/widgets_view_pager"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:clipToPadding="false"
+            android:paddingHorizontal="@dimen/widget_list_horizontal_margin_two_pane"
             android:descendantFocusability="afterDescendants"
             launcher:pageIndicator="@+id/tabs" >
 
@@ -48,11 +51,13 @@
         </com.android.launcher3.widget.picker.WidgetPagedView>
 
         <!-- SearchAndRecommendationsView without the tab layout as well -->
+        <!-- Note: the horizontal padding matches with the WidgetPagedView -->
         <com.android.launcher3.views.StickyHeaderLayout
             android:id="@+id/search_and_recommendations_container"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:clipToOutline="true"
+            android:paddingHorizontal="@dimen/widget_list_horizontal_margin_two_pane"
             android:orientation="vertical">
 
             <LinearLayout