Don't close popup container if touch came from nav bar

Moved EDGE_NAV_BAR from quickstep package to launcher3

Bug: 127917144
Change-Id: Ic619ea49896ca8e49a9a539b7dc7d682291241b7
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 7036639..dd755cb 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -54,6 +54,7 @@
 import android.util.Log;
 import android.util.Pair;
 import android.util.TypedValue;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.animation.Interpolator;
 
@@ -115,6 +116,11 @@
     public static final int SINGLE_FRAME_MS = 16;
 
     /**
+     * Set on a motion event dispatched from the nav bar. See {@link MotionEvent#setEdgeFlags(int)}.
+     */
+    public static final int EDGE_NAV_BAR = 1 << 8;
+
+    /**
      * Indicates if the device has a debug build. Should only be used to store additional info or
      * add extra logging and not for changing the app behavior.
      */