Replaced android::Vector with std::vector.

Change-Id: I4c6abd964dc4b1412ec2e592fc8e835fecfe53f6
diff --git a/rsElement.h b/rsElement.h
index 5a3bc13..2ae9404 100644
--- a/rsElement.h
+++ b/rsElement.h
@@ -17,6 +17,8 @@
 #ifndef ANDROID_STRUCTURED_ELEMENT_H
 #define ANDROID_STRUCTURED_ELEMENT_H
 
+#include <vector>
+
 #include "rsComponent.h"
 #include "rsUtils.h"
 #include "rsDefines.h"
@@ -170,7 +172,7 @@
     ~ElementState();
 
     // Cache of all existing elements.
-    Vector<Element *> mElements;
+    std::vector<Element *> mElements;
 };