@CanIgnoreReturnValue
    @Deprecated
    public Builder doNotUseKeystore() {
      masterKeyUri = null;
      useKeystore = false;
      return this;
    }
Does not use Android Keystore which might not work well in some phones.

<p><b>Warning:</b> When Android Keystore is disabled, keys are stored in cleartext. This
should be safe because they are stored in private preferences.

@deprecated Please do not use this function. Instead, do not call {#code withMasterKeyUri}
    which has the same effect.
java_src/src/main/java/com/google/crypto/tink/integration/android/AndroidKeysetManager.java