Remove unused code.

        return lp;

    }

    private boolean hasFaceAndFingerprintSensors() {

        final int[] ids = findFaceAndFingerprintSensors();

        return ids[0] >= 0 && ids[1] >= 0;

    }

    // returns [face, fingerprint] sensor ids (id is -1 if not present)

    private int[] findFaceAndFingerprintSensors() {

        int faceSensorId = -1;

import android.hardware.biometrics.PromptInfo;

import android.hardware.biometrics.SensorPropertiesInternal;

import android.os.UserManager;

import android.util.DisplayMetrics;

import android.view.ViewGroup;

import android.view.accessibility.AccessibilityEvent;

import android.view.accessibility.AccessibilityManager;

    @IntDef({CREDENTIAL_PIN, CREDENTIAL_PATTERN, CREDENTIAL_PASSWORD})

    @interface CredentialType {}

    static float dpToPixels(Context context, float dp) {

        return dp * ((float) context.getResources().getDisplayMetrics().densityDpi

                / DisplayMetrics.DENSITY_DEFAULT);

    }

    static float pixelsToDp(Context context, float pixels) {

        return pixels / ((float) context.getResources().getDisplayMetrics().densityDpi

                / DisplayMetrics.DENSITY_DEFAULT);

    }

    static void notifyAccessibilityContentChanged(AccessibilityManager am, ViewGroup view) {

        if (!am.isEnabled()) {

            return;