Migrate to public IndentingPrintWriter

Test: adb shell dumpsys network_stack
Change-Id: I9a0d87ac19b5c21991b6b54626df0ee3f7c2b077
diff --git a/jarjar-rules-shared.txt b/jarjar-rules-shared.txt
index 7346b1a..bb70f80 100644
--- a/jarjar-rules-shared.txt
+++ b/jarjar-rules-shared.txt
@@ -8,3 +8,5 @@
 rule android.net.DhcpResultsParcelable* @0
 rule android.net.DhcpResults* android.net.networkstack.DhcpResults@1
 rule android.net.LocalLog* android.net.networkstack.LocalLog@1
+
+rule android.util.IndentingPrintWriter* android.net.networkstack.util.AndroidUtilIndentingPrintWriter@1