TBR: android/reader: fix the link toggle bug

Change-Id: Iab2623e27952ef7c13f367598aa35f307975ca7f
diff --git a/android/app/src/main/java/io/v/android/apps/reader/PdfViewerActivity.java b/android/app/src/main/java/io/v/android/apps/reader/PdfViewerActivity.java
index 937f733..d0f65f2 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/PdfViewerActivity.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/PdfViewerActivity.java
@@ -121,12 +121,12 @@
                     return;
                 }
 
-                DeviceMeta dm = getDeviceMeta();
-
                 int oldPage = getPage();
                 mCurrentDS = cloneDeviceSet(changed);
                 int newPage = getPage();
 
+                DeviceMeta dm = getDeviceMeta();
+
                 if (oldPage != newPage) {
                     mPdfView.setPage(dm.getPage());
                     writeNavigationAction("Page Changed", newPage);