Forcing drag layer to be non accessible.

Setting a touch delegate makes a view to become accessible, if its set to auto.
This was making drayLayer accessible causing Talkback to speak out every item
on the draglayer when window focus changes

Bug: 30670702
Change-Id: Ifcba4c02b124166f9ca69c4244b9d20d7a7acaa5

res/layout-land/launcher.xml

@@ -27,6 +27,7 @@
         android:id="@+id/drag_layer"
         android:clipChildren="false"
         android:clipToPadding="false"
+        android:importantForAccessibility="no"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 

res/layout-port/launcher.xml

@@ -27,6 +27,7 @@
     <com.android.launcher3.dragndrop.DragLayer
         android:id="@+id/drag_layer"
         android:clipChildren="false"
+        android:importantForAccessibility="no"
         android:clipToPadding="false"
         android:layout_width="match_parent"
         android:layout_height="match_parent">

res/layout-sw720dp/launcher.xml

@@ -27,6 +27,7 @@
         android:id="@+id/drag_layer"
         android:clipChildren="false"
         android:clipToPadding="false"
+        android:importantForAccessibility="no"
         android:layout_width="match_parent"
         android:layout_height="match_parent">