Add a string based createUri().

Change-Id: Ie26977684d0f48201daa605b8b6057ab9afb370e
diff --git a/core/java/android/nfc/NdefRecord.java b/core/java/android/nfc/NdefRecord.java
index 5ade9eb..0eb8cd8 100644
--- a/core/java/android/nfc/NdefRecord.java
+++ b/core/java/android/nfc/NdefRecord.java
@@ -338,7 +338,15 @@
      * @hide
      */
     public static NdefRecord createUri(Uri uri) {
-        String uriString = uri.toString();
+        return createUri(uri.toString());
+    }
+
+    /**
+     * Creates an NDEF record of well known type URI.
+     * TODO: Make a public API
+     * @hide
+     */
+    public static NdefRecord createUri(String uriString) {
         byte prefix = 0x0;
         for (int i = 1; i < URI_PREFIX_MAP.length; i++) {
             if (uriString.startsWith(URI_PREFIX_MAP[i])) {