Introduce new file read path

app/src/main/java/com/hippo/unifile/RawFile.java

@@ -32,11 +32,11 @@ import java.io.OutputStream;
 import java.io.RandomAccessFile;
 import java.util.ArrayList;
 
-class RawFile extends UniFile {
+public class RawFile extends UniFile {
 
     private static final String TAG = RawFile.class.getSimpleName();
 
-    private File mFile;
+    public File mFile;
 
     RawFile(UniFile parent, File file) {
         super(parent);