Add NetworkFactory to connectivity jarjar rules

NetworkFactory is part of net-utils-device-common, but is outside of
the com.android.net.module.util and needs a separate jarjar rule.

Bug: 171540887
Test: atest FrameworksNetTests
Change-Id: Iec828a789175acdbe4e7f35e4cc942922540495c
diff --git a/framework/jarjar-rules.txt b/framework/jarjar-rules.txt
index 0959840..7474c24 100644
--- a/framework/jarjar-rules.txt
+++ b/framework/jarjar-rules.txt
@@ -1,4 +1,5 @@
 rule com.android.net.module.util.** android.net.connectivity.framework.util.@1
+rule android.net.NetworkFactory* android.net.connectivity.framework.NetworkFactory@1
 
 # TODO (b/149403767): remove the annotations from net-utils-device-common instead of here
 zap android.annotation.**