Use OutputFilesProvider in module_test

In the context of incremental soong, the output files
inter-module-communication will be through OutputFilesProvider.
The OutputFileProducer interface will be deprecated.

Test: CI
Bug: 339477385
Change-Id: Iaf0b039b17d34e1a696f2c87df2f0db39307fc6d
diff --git a/android/module.go b/android/module.go
index 2fe822f..d9b8545 100644
--- a/android/module.go
+++ b/android/module.go
@@ -2491,18 +2491,9 @@
 	if outputFilesFromProvider != nil || err != OutputFilesProviderNotSet {
 		return outputFilesFromProvider, err
 	}
-	// TODO: add error when outputFilesFromProvider and err are both nil after
-	// OutputFileProducer and SourceFileProducer are deprecated.
-	if outputFileProducer, ok := module.(OutputFileProducer); ok {
-		paths, err := outputFileProducer.OutputFiles(tag)
-		if err != nil {
-			return nil, fmt.Errorf("failed to get output file from module %q at tag %q: %s",
-				pathContextName(ctx, module), tag, err.Error())
-		}
-		return paths, nil
-	} else if sourceFileProducer, ok := module.(SourceFileProducer); ok {
+	if sourceFileProducer, ok := module.(SourceFileProducer); ok {
 		if tag != "" {
-			return nil, fmt.Errorf("module %q is a SourceFileProducer, not an OutputFileProducer, and so does not support tag %q", pathContextName(ctx, module), tag)
+			return nil, fmt.Errorf("module %q is a SourceFileProducer, which does not support tag %q", pathContextName(ctx, module), tag)
 		}
 		paths := sourceFileProducer.Srcs()
 		return paths, nil
@@ -2521,7 +2512,12 @@
 	var outputFiles OutputFilesInfo
 	fromProperty := false
 
-	if mctx, isMctx := ctx.(ModuleContext); isMctx {
+	type OutputFilesProviderModuleContext interface {
+		OtherModuleProviderContext
+		Module() Module
+	}
+
+	if mctx, isMctx := ctx.(OutputFilesProviderModuleContext); isMctx {
 		if mctx.Module() != module {
 			outputFiles, _ = OtherModuleProvider(mctx, module, OutputFilesProvider)
 		} else {
@@ -2535,7 +2531,6 @@
 	// TODO: Add a check for skipped context
 
 	if outputFiles.isEmpty() {
-		// TODO: Add a check for param module not having OutputFilesProvider set
 		return nil, OutputFilesProviderNotSet
 	}