Merge "Mark BiometricUnlockController as @Singleton"

import java.lang.annotation.RetentionPolicy;

import javax.inject.Inject;

import javax.inject.Singleton;

/**

 * Controller which coordinates all the biometric unlocking actions with the UI.

 */

@Singleton

public class BiometricUnlockController extends KeyguardUpdateMonitorCallback {

    private static final String TAG = "BiometricUnlockCtrl";