Implement Widevine drm HIDL HAL service.

Modify Android mediadrm and mediacrypto glue layer to use
HIDL interface.

Test: Play Movies (streaming and offline playback)

Test: ANDROID_BUILD_TOP= ./android-gts/tools/gts-tradefed
run gts -m GtsMediaTestCases

Test:
adb shell /system/bin/libwvdrmengine_hidl_test

Test:
adb shell /system/bin/libwvdrmmediacrypto_hidl_test

Test:
adb shell /system/bin/libwvdrmdrmplugin_hidl_test

bug: 34628973
Change-Id: Icd5f2dd556acb9874697963b4d7d62cb7c943e74

libwvdrmengine/src_hidl/WVCreatePluginFactories.cpp

@@ -0,0 +1,31 @@
+//
+// Copyright 2017 Google Inc. All Rights Reserved.
+//
+
+#include "WVCreatePluginFactories.h"
+
+#include "WVCryptoFactory.h"
+#include "WVDrmFactory.h"
+
+namespace wvdrm {
+namespace hardware {
+namespace drm {
+namespace V1_0 {
+namespace widevine {
+
+extern "C" {
+
+IDrmFactory* createDrmFactory() {
+  return new WVDrmFactory();
+}
+
+ICryptoFactory* createCryptoFactory() {
+  return new WVCryptoFactory();
+}
+
+}  // extern "C"
+}  // namespace widevine
+}  // namespace V1_0
+}  // namespace drm
+}  // namespace hardware
+}  // namespace wvdrm