import android.provider.ContactsInternal;
import android.provider.Settings;
import android.provider.Settings.Global;
+import android.security.Credentials;
import android.security.IKeyChainAliasCallback;
import android.security.IKeyChainService;
import android.security.KeyChain;
import android.security.keystore.KeyGenParameterSpec;
import android.security.keystore.ParcelableKeyGenParameterSpec;
import android.security.KeyStore;
+import android.security.keystore.AttestationUtils;
import android.service.persistentdata.PersistentDataBlockManager;
import android.telephony.TelephonyManager;
import android.text.TextUtils;