Initial import of Widevine Common Encryption DRM engine

Builds libwvmdrmengine.so, which is loaded by the new
MediaDrm APIs to support playback of Widevine/CENC
protected content.

Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c

libwvdrmengine/test/unit/WVCreateDrmPluginFactory_test.cpp

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2012 Google Inc. All Rights Reserved.
+ */
+
+#include "gtest/gtest.h"
+#include "utils/UniquePtr.h"
+#include "WVCreateDrmPluginFactory.h"
+
+using namespace android;
+
+TEST(CreateDrmPluginFactoryTest, CreatesObject) {
+  UniquePtr<DrmPluginFactory> factory(createDrmPluginFactory());
+
+  EXPECT_NE((DrmPluginFactory*)NULL, factory.get()) << "createDrmPluginFactory() returned null";
+}