Add missing <algorithm> include for std::sort.

Change-Id: I9b7e85e433b32bf76f69f1486a217bdc843e7169
diff --git a/property_service/libpropertyinfoserializer/trie_serializer.cpp b/property_service/libpropertyinfoserializer/trie_serializer.cpp
index adeed1b..f1632cd 100644
--- a/property_service/libpropertyinfoserializer/trie_serializer.cpp
+++ b/property_service/libpropertyinfoserializer/trie_serializer.cpp
@@ -16,6 +16,8 @@
 
 #include "trie_serializer.h"
 
+#include <algorithm>
+
 namespace android {
 namespace properties {