Merge "Update exportable to handle documentation issues being errors" into main am: 1d903eb078

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3110137

Change-Id: I16ec61988da6f1fb9f93d8e89979036a1b0eb402
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/java/droidstubs.go b/java/droidstubs.go
index b94ad16..5ca6c25 100644
--- a/java/droidstubs.go
+++ b/java/droidstubs.go
@@ -1153,6 +1153,9 @@
 		}
 	}
 
+	// Treat documentation issues as warnings, but error when new.
+	cmd.Flag("--error-when-new-category").Flag("Documentation")
+
 	if params.stubConfig.generateStubs {
 		rule.Command().
 			BuiltTool("soong_zip").