add DeviceInfo

This reverts commit 096895550b9d5430d7a001d491566decf4f9791b.

Change-Id: Ib2ed1e96d8f7f88302f5e27fe735687194553104
diff --git a/libs/hwui/utils/StringUtils.cpp b/libs/hwui/utils/StringUtils.cpp
index a1df0e7..64a5970 100644
--- a/libs/hwui/utils/StringUtils.cpp
+++ b/libs/hwui/utils/StringUtils.cpp
@@ -19,21 +19,19 @@
 namespace android {
 namespace uirenderer {
 
-StringCollection::StringCollection(const char* spacedList) {
+unordered_string_set StringUtils::split(const char* spacedList) {
+    unordered_string_set set;
     const char* current = spacedList;
     const char* head = current;
     do {
         head = strchr(current, ' ');
         std::string s(current, head ? head - current : strlen(current));
         if (s.length()) {
-            mSet.insert(s);
+            set.insert(std::move(s));
         }
         current = head + 1;
     } while (head);
-}
-
-bool StringCollection::has(const char* s) {
-    return mSet.find(std::string(s)) != mSet.end();
+    return set;
 }
 
 }; // namespace uirenderer
diff --git a/libs/hwui/utils/StringUtils.h b/libs/hwui/utils/StringUtils.h
index ef2a6d5..055869f 100644
--- a/libs/hwui/utils/StringUtils.h
+++ b/libs/hwui/utils/StringUtils.h
@@ -22,12 +22,16 @@
 namespace android {
 namespace uirenderer {
 
-class StringCollection {
+class unordered_string_set : public std::unordered_set<std::string> {
 public:
-    StringCollection(const char* spacedList);
-    bool has(const char* string);
-private:
-    std::unordered_set<std::string> mSet;
+    bool has(const char* str) {
+        return find(std::string(str)) != end();
+    }
+};
+
+class StringUtils {
+public:
+    static unordered_string_set split(const char* spacedList);
 };
 
 } /* namespace uirenderer */