Prevent drawing on top of DevicePickerActivity

Bug: 182584940
Merged-In: I8b27b397bce1708a42b96b1b647c64e23142c468
Change-Id: I8b27b397bce1708a42b96b1b647c64e23142c468
diff --git a/src/com/android/settings/bluetooth/DevicePickerActivity.java b/src/com/android/settings/bluetooth/DevicePickerActivity.java
index d3d9d78..0797bc3 100644
--- a/src/com/android/settings/bluetooth/DevicePickerActivity.java
+++ b/src/com/android/settings/bluetooth/DevicePickerActivity.java
@@ -16,6 +16,8 @@
 
 package com.android.settings.bluetooth;
 
+import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 import android.app.Activity;
 import android.os.Bundle;
 
@@ -30,6 +32,7 @@
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        getWindow().addPrivateFlags(PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         setContentView(R.layout.bluetooth_device_picker);
     }
 }