Prevent overlay drawing on top of Bluetooth pairing dialog

import androidx.annotation.VisibleForTesting;

import androidx.annotation.VisibleForTesting;

import androidx.fragment.app.FragmentActivity;

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

 * 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.

 * for pairing with a remote Bluetooth device. It is an activity that appears as a dialog.

    @Override

    @Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

    protected void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        super.onCreate(savedInstanceState);

        getWindow().addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);

        Intent intent = getIntent();

        Intent intent = getIntent();

        mBluetoothPairingController = new BluetoothPairingController(intent, this);

        mBluetoothPairingController = new BluetoothPairingController(intent, this);

        // build the dialog fragment

        // build the dialog fragment