Move to the canonical UniquePtr.h.

Change-Id: I5330c36d2b571acb6d3debd30b8020e33aa8a4a7
diff --git a/include/utils/LruCache.h b/include/utils/LruCache.h
index 053bfaf..f057043 100644
--- a/include/utils/LruCache.h
+++ b/include/utils/LruCache.h
@@ -18,7 +18,7 @@
 #define ANDROID_UTILS_LRU_CACHE_H
 
 #include <utils/BasicHashtable.h>
-#include <utils/UniquePtr.h>
+#include <UniquePtr.h>
 
 namespace android {