Minor clenaup in LauncherBackAnimationController

    private final RectF mCurrentRect = new RectF();

    private final QuickstepLauncher mLauncher;

    private final int mWindowScaleMarginX;

    /** Max window translation in the Y axis. */

    private final int mWindowMaxDeltaY;

    private float mWindowScaleEndCornerRadius;

    private float mWindowScaleStartCornerRadius;

    private final Interpolator mCancelInterpolator;

    private RemoteAnimationTarget mBackTarget;

    private View mLauncherTargetView;

    private SurfaceControl.Transaction mTransaction = new SurfaceControl.Transaction();

    private final SurfaceControl.Transaction mTransaction = new SurfaceControl.Transaction();

    private boolean mSpringAnimationInProgress = false;

    private boolean mAnimatorSetInProgress = false;

    private float mBackProgress = 0;

    private boolean mBackInProgress = false;

    private OnBackInvokedCallbackStub mBackCallback;

    private IRemoteAnimationFinishedCallback mAnimationFinishedCallback;

    private BackProgressAnimator mProgressAnimator = new BackProgressAnimator();

    private final BackProgressAnimator mProgressAnimator = new BackProgressAnimator();

    private SurfaceControl mScrimLayer;

    private ValueAnimator mScrimAlphaAnimator;

    private float mScrimAlpha;

        loadCornerRadius();

        mWindowScaleMarginX = mLauncher.getResources().getDimensionPixelSize(

                R.dimen.swipe_back_window_scale_x_margin);

        mWindowMaxDeltaY = mLauncher.getResources().getDimensionPixelSize(

                R.dimen.swipe_back_window_max_delta_y);

        mCancelInterpolator =

                AnimationUtils.loadInterpolator(mLauncher, R.interpolator.standard_interpolator);

    }

    <!-- Swipe back to home related -->

    <dimen name="swipe_back_window_scale_x_margin">10dp</dimen>

    <dimen name="swipe_back_window_max_delta_y">160dp</dimen>

    <dimen name="swipe_back_window_corner_radius">40dp</dimen>

    <!-- The duration of the bottom sheet opening and closing animation -->