Merge "Check if public namespace has already been initialized"

am: 0756fae4f1

* commit '0756fae4f1aea5072ed820087b2487b408194c38':
  Check if public namespace has already been initialized

Change-Id: Ia338baa984c3ca310f4a30db1d094704607e5cc9

libnativeloader/native_loader.cpp

@@ -117,6 +117,13 @@ class LibraryNamespaces {
   }
 
   void Initialize() {
+    // Once public namespace is initialized there is no
+    // point in running this code - it will have no effect
+    // on the current list of public libraries.
+    if (initialized_) {
+      return;
+    }
+
     std::vector<std::string> sonames;
     const char* android_root_env = getenv("ANDROID_ROOT");
     std::string root_dir = android_root_env != nullptr ? android_root_env : "/system";