@Override
  @RequiresApi(23)
  public KmsClient withDefaultCredentials() throws GeneralSecurityException {
    return new AndroidKeystoreKmsClient();
  }
Initializes a {@code KmsClient} for Android Keystore.

<p>Note that Android Keystore does not use credentials.
java_src/src/main/java/com/google/crypto/tink/integration/android/AndroidKeystoreKmsClient.java