Correct the comments on property exclude_kotlinc_generated_file, which defaults to false actually.

Bug: 204888276
Test: Treehugger

Change-Id: Ib0405395da9a8cf8dd7bb1983fcd13425fe69b34
diff --git a/java/dex.go b/java/dex.go
index b879632..474694a 100644
--- a/java/dex.go
+++ b/java/dex.go
@@ -73,7 +73,7 @@
 	// It exists only to support ART tests.
 	Uncompress_dex *bool
 
-	// Exclude kotlinc generate files: *.kotlin_module, *.kotlin_builtins. Defaults to true.
+	// Exclude kotlinc generate files: *.kotlin_module, *.kotlin_builtins. Defaults to false.
 	Exclude_kotlinc_generated_files *bool
 }