Make NonNull explicit

Inherited

android-project/app/src/main/java/org/diasurgical/devilutionx/DataActivity.java

@@ -9,6 +9,7 @@ import android.content.IntentFilter;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.text.method.LinkMovementMethod;
 import android.view.View;
 import android.widget.TextView;
@@ -162,7 +163,7 @@ public class DataActivity extends Activity {
 	 */
 	private class DownloadReceiver extends BroadcastReceiver {
 		@Override
-		public void onReceive(Context context, Intent intent) {
+		public void onReceive(@NonNull Context context, @NonNull Intent intent) {
 			long receivedID = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1L);
 			DownloadManager mgr = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);