Revert "Revert "Use NetworkStackNext as preinstalled network stack""

This reverts commit a60d3c0dc1b87c1cfebfc9b42488e2147a6bd21a.

Reason for revert: Roll forward after fixing tests in b/144168912

Change-Id: Ibe68f086f10bbef7590ac4b721be4e1709e154dc
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 2fd0312..72caee2 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -206,7 +206,7 @@
     mtpd \
     ndc \
     netd \
-    NetworkStack \
+    NetworkStackNext \
     org.apache.http.legacy \
     otacerts \
     PackageInstaller \