Use OutputFilesProvider on sdk

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: I786661d2ef882fe5dc7a0f67fa28f5df78f1f259

sdk/sdk.go

@@ -193,6 +193,10 @@ func (s *sdk) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		// Generate the snapshot from the member info.
 		s.buildSnapshot(ctx, sdkVariants)
 	}
+
+	if s.snapshotFile.Valid() {
+		ctx.SetOutputFiles([]android.Path{s.snapshotFile.Path()}, "")
+	}
 }
 
 func (s *sdk) AndroidMkEntries() []android.AndroidMkEntries {
@@ -222,18 +226,6 @@ func (s *sdk) AndroidMkEntries() []android.AndroidMkEntries {
 	}}
 }
 
-func (s *sdk) OutputFiles(tag string) (android.Paths, error) {
-	switch tag {
-	case "":
-		if s.snapshotFile.Valid() {
-			return []android.Path{s.snapshotFile.Path()}, nil
-		}
-		return nil, fmt.Errorf("snapshot file not defined. This is most likely because this isn't the common_os variant of this module")
-	default:
-		return nil, fmt.Errorf("unknown tag %q", tag)
-	}
-}
-
 // gatherTraits gathers the traits from the dynamically generated trait specific properties.
 //
 // Returns a map from member name to the set of required traits.