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/include_hidl/WVDrmFactory.h

@@ -0,0 +1,54 @@
+//
+// Copyright 2017 Google Inc. All Rights Reserved.
+//
+
+#ifndef WV_DRM_FACTORY_H_
+#define WV_DRM_FACTORY_H_
+
+#include <android/hardware/drm/1.0/IDrmFactory.h>
+
+#include "WVGenericCryptoInterface.h"
+#include "WVTypes.h"
+
+namespace wvdrm {
+namespace hardware {
+namespace drm {
+namespace V1_0 {
+namespace widevine {
+
+using ::android::hardware::drm::V1_0::IDrmFactory;
+using ::android::hardware::drm::V1_0::IDrmPlugin;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_string;
+using ::android::hardware::Return;
+
+struct WVDrmFactory : public IDrmFactory {
+  WVDrmFactory() {}
+  virtual ~WVDrmFactory() {}
+
+  Return<bool> isCryptoSchemeSupported(const hidl_array<uint8_t, 16>& uuid)
+      override;
+
+  Return<bool> isContentTypeSupported(const hidl_string &mimeType)
+      override;
+
+  Return<void> createPlugin(
+      const hidl_array<uint8_t, 16>& uuid,
+      const hidl_string& appPackageName,
+      createPlugin_cb _hidl_cb) override;
+
+ private:
+  WVDRM_DISALLOW_COPY_AND_ASSIGN(WVDrmFactory);
+
+  static WVGenericCryptoInterface sOemCryptoInterface;
+};
+
+extern "C" IDrmFactory* HIDL_FETCH_IDrmFactory(const char* name);
+
+}  // namespace widevine
+}  // namespace V1_0
+}  // namespace drm
+}  // namespace hardware
+}  // namespace wvdrm
+
+#endif // WV_DRM_FACTORY_H_