Revert "Hide non-system overlay window on ActivityPicker"

This reverts commit 855b1f428d.

Reason for revert: <b/184623294>

Change-Id: Ie1eb6f86feda56d6444971fa5dfd2c11357fab01

src/com/android/settings/ActivityPicker.java

@@ -16,8 +16,6 @@
 
 package com.android.settings;
 
-import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
-
 import android.app.Activity;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -73,8 +71,6 @@ public class ActivityPicker extends AlertActivity implements
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
-        getWindow().addPrivateFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         
         final Intent intent = getIntent();