Add public getter for IpPrefix

Test: TH
Change-Id: I8d2c8e1a6b76f04257f2137c1ce893b59e52e420
diff --git a/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java b/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java
index ecdd440..b0f19e2 100644
--- a/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java
+++ b/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java
@@ -129,6 +129,10 @@
         return true;
     }
 
+    public IpPrefix getIpPrefix() {
+        return mIpPrefix;
+    }
+
     /**
      * Check whether or not IA Prefix option has 0 preferred and valid lifetimes.
      */