android: add libnfnetlink and libnetfilter_conntrack

Change-Id: I346103bc1b9227986cff674269919236d3cace20
diff --git a/remove.xml b/remove.xml
index 79a191b..b7269e2 100644
--- a/remove.xml
+++ b/remove.xml
@@ -53,6 +53,9 @@
   <remove-project name="device/linaro/hikey-kernel" />
   <remove-project name="device/sample" />
 
+  <remove-project name="platform/external/libnfnetlink" />
+  <remove-project name="platform/external/libnetfilter_conntrack" />
+
   <remove-project name="platform/frameworks/av" />
   <remove-project name="platform/frameworks/base" />
   <remove-project name="platform/frameworks/native" />