Adopted Storage: backup keys but do not wipe them

Change-Id: I545a32848ee686ecfacd13604ae3f18f5d206dfc
diff --git a/partition.cpp b/partition.cpp
index f523ddf..ac0c199 100644
--- a/partition.cpp
+++ b/partition.cpp
@@ -911,7 +911,7 @@
 		DataManager::SetValue("tw_has_internal", 1);
 		DataManager::SetValue("tw_has_data_media", 1);
 		backup_exclusions.add_absolute_dir("/data/data/com.google.android.music/files");
-		ExcludeAll(Mount_Point + "/misc/vold");
+		wipe_exclusions.add_absolute_dir(Mount_Point + "/misc/vold"); // adopted storage keys
 		ExcludeAll(Mount_Point + "/.layout_version");
 		ExcludeAll(Mount_Point + "/system/storage.xml");
 	} else {