Adjust check for target_sdk_version for workarounds

target_sdk_version=0 is a valid version, it basically
means 1 (the very first version of android) not current one.

Bug: http://b/27702070
Change-Id: Ib7843718f364b975e1d09a05377bf8580b407d9d
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index 5fc3475..ec7a941 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -40,8 +40,7 @@
 static constexpr const char* kPublicNativeLibrariesConfig = "/system/etc/public.libraries.txt";
 
 static bool namespace_workaround_enabled(int32_t target_sdk_version) {
-  // target_sdk_version = 0 is another way of saying "target current sdk level"
-  return target_sdk_version != 0 && target_sdk_version <= 23;
+  return target_sdk_version <= 23;
 }
 
 class LibraryNamespaces {