Fixing nulpointer exception in AOSP quickstep builds

package com.android.quickstep;

import static android.content.Intent.ACTION_USER_UNLOCKED;

import static com.android.launcher3.ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE;

import static com.android.launcher3.ResourceUtils.NAVBAR_LANDSCAPE_LEFT_RIGHT_SIZE;

import static com.android.quickstep.SysUINavigationMode.Mode.NO_BUTTON;

import android.text.TextUtils;

import android.view.MotionEvent;

import android.view.Surface;

import androidx.annotation.BinderThread;

import com.android.launcher3.R;

import com.android.launcher3.ResourceUtils;

import com.android.launcher3.Utilities;

import com.android.systemui.shared.system.QuickStepContract;

import com.android.systemui.shared.system.QuickStepContract.SystemUiStateFlags;

import com.android.systemui.shared.system.SystemGestureExclusionListenerCompat;

import java.io.PrintWriter;

import java.util.ArrayList;

     * @return whether the given running task info matches the gesture-blocked activity.

     */

    public boolean isGestureBlockedActivity(ActivityManager.RunningTaskInfo runningTaskInfo) {

        return runningTaskInfo != null

        return runningTaskInfo != null && mGestureBlockedActivity != null

                && mGestureBlockedActivity.equals(runningTaskInfo.topActivity);

    }