Add nullability annotation to avoid warning in Kotlin code

import android.app.PendingIntent;

import androidx.annotation.NonNull;

import androidx.lifecycle.Lifecycle.Event;

import androidx.lifecycle.LifecycleObserver;

import androidx.lifecycle.LifecycleOwner;

        return openPgpProviderName != null ? openPgpProviderName : openPgpProvider;

    }

    @NonNull

    public OpenPgpProviderState getOpenPgpProviderState() {

        return openPgpProviderState;

    }