Revert "Reland: "init: run property service in a thread""

This reverts commit 8efca4bbb378ff5bd3af06d8511ea75a7ed49f99.

Reason for revert: Still broken

Change-Id: I3b37b1b00ff4b19f2eec2d8bd72042463d47cee3
diff --git a/init/subcontext.proto b/init/subcontext.proto
index e68115e..c31f4fb 100644
--- a/init/subcontext.proto
+++ b/init/subcontext.proto
@@ -38,4 +38,10 @@
         Failure failure = 2;
         ExpandArgsReply expand_args_reply = 3;
     }
+
+    message PropertyToSet {
+        optional string name = 1;
+        optional string value = 2;
+    }
+    repeated PropertyToSet properties_to_set = 4;
 }
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