Revert "Revert "Make system property reads wait-free""

This reverts commit de39d9242ae38733c33173957386db0b8060e52a.

Reason for revert: This revert is not needed

Change-Id: I34af8e5d75c724f6c4066fafbfc6bc7d58377601
diff --git a/benchmarks/property_benchmark.cpp b/benchmarks/property_benchmark.cpp
index 77814bf..ba54ed1 100644
--- a/benchmarks/property_benchmark.cpp
+++ b/benchmarks/property_benchmark.cpp
@@ -184,7 +184,7 @@
 
   size_t i = 0;
   while (state.KeepRunning()) {
-    pa.system_properties().Serial(pinfo[i]);
+    __system_property_serial(pinfo[i]);
     i = (i + 1) % nprops;
   }