Migrating Incremental* APIs to PackageManager APIs.

Step 2, merging Data Loader params.

Test: builds and flashes
Bug: b/136132412

Change-Id: I2102554316dadcdcb49790c133ece110c43c29b3
diff --git a/services/incremental/Metadata.proto b/services/incremental/Metadata.proto
index 0ff3c32..79f1bf8 100644
--- a/services/incremental/Metadata.proto
+++ b/services/incremental/Metadata.proto
@@ -10,7 +10,9 @@
 
 message DataLoader {
     string package_name = 1;
+    string class_name = 3;
     string arguments = 2;
+    int32 type = 4;
 }
 
 message Storage {