Add ICMPv6 NS Souce Link Layer Option Length constant am: 9c87172ad2 am: b9107581df

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3113219

Change-Id: I975992b12e32c180d266d3284fd7e977128e795f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java b/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java
index 19d8bbe..319d51a 100644
--- a/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java
+++ b/staticlibs/framework/com/android/net/module/util/NetworkStackConstants.java
@@ -180,6 +180,7 @@
     public static final int ICMPV6_NS_HEADER_LEN = 24;
     public static final int ICMPV6_NA_HEADER_LEN = 24;
     public static final int ICMPV6_ND_OPTION_TLLA_LEN = 8;
+    public static final int ICMPV6_ND_OPTION_SLLA_LEN = 8;
 
     public static final int NEIGHBOR_ADVERTISEMENT_FLAG_ROUTER    = 1 << 31;
     public static final int NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED = 1 << 30;