Prevent overlay drawing on top of Bluetooth pairing dialog am: 88815d1456 am: 103cc7cf29

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/11484060

Change-Id: Ifbdd0f3dabc0b487bfb5155f786cae6a9980557b

src/com/android/settings/bluetooth/BluetoothPairingDialog.java

@@ -27,6 +27,8 @@ import android.os.Bundle;
 import androidx.annotation.VisibleForTesting;
 import androidx.fragment.app.FragmentActivity;
 
+import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;
+
 /**
  * BluetoothPairingDialog asks the user to enter a PIN / Passkey / simple confirmation
  * for pairing with a remote Bluetooth device. It is an activity that appears as a dialog.
@@ -64,6 +66,8 @@ public class BluetoothPairingDialog extends FragmentActivity {
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        getWindow().addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         Intent intent = getIntent();
         if (intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE) == null) {
             // Error handler for the case that dialog is started from adb command.