Automatically greylist code in 3P packages

Bug: 129387816
Test: m appcompat
Test: frameworks/base/tools/hiddenapi/generate_hiddenapi_lists_test.py
Change-Id: Id55abed766a6de6a2c032ee12d5153ab73a8d65c
diff --git a/java/hiddenapi_singleton.go b/java/hiddenapi_singleton.go
index 86531eb..139114b 100644
--- a/java/hiddenapi_singleton.go
+++ b/java/hiddenapi_singleton.go
@@ -236,6 +236,8 @@
 			android.PathForSource(ctx, "frameworks/base/config/hiddenapi-greylist-max-o.txt")).
 		FlagWithInput("--blacklist ",
 			android.PathForSource(ctx, "frameworks/base/config/hiddenapi-force-blacklist.txt")).
+		FlagWithInput("--greylist-packages ",
+			android.PathForSource(ctx, "frameworks/base/config/hiddenapi-greylist-packages.txt")).
 		FlagWithOutput("--output ", tempPath)
 
 	commitChangeForRestat(rule, tempPath, outputPath)