Add native libraries

native/src/main/java/com/hippo/Native.java

@@ -0,0 +1,12 @@
+package com.hippo;
+
+import android.content.Context;
+
+import com.getkeepsafe.relinker.ReLinker;
+
+public class Native {
+
+    public static void initialize(Context context) {
+        ReLinker.loadLibrary(context, "ehviewer");
+    }
+}