Use OutputFilesProvider on filesystem module types

Test: CI
Bug: 339477385
Change-Id: I0902726cfef13c716d73c1abc5c9836bdcf3e10f
diff --git a/filesystem/logical_partition.go b/filesystem/logical_partition.go
index e2f7d7b..e483fe4 100644
--- a/filesystem/logical_partition.go
+++ b/filesystem/logical_partition.go
@@ -185,6 +185,8 @@
 
 	l.installDir = android.PathForModuleInstall(ctx, "etc")
 	ctx.InstallFile(l.installDir, l.installFileName(), l.output)
+
+	ctx.SetOutputFiles([]android.Path{l.output}, "")
 }
 
 // Add a rule that converts the filesystem for the given partition to the given rule builder. The
@@ -231,13 +233,3 @@
 func (l *logicalPartition) SignedOutputPath() android.Path {
 	return nil // logical partition is not signed by itself
 }
-
-var _ android.OutputFileProducer = (*logicalPartition)(nil)
-
-// Implements android.OutputFileProducer
-func (l *logicalPartition) OutputFiles(tag string) (android.Paths, error) {
-	if tag == "" {
-		return []android.Path{l.output}, nil
-	}
-	return nil, fmt.Errorf("unsupported module reference tag %q", tag)
-}