Use aidl interface for Widevine service.

The interface is defined in
hardware/interfaces/drm/aidl(http://go/ag/15329852).

Test: build
  m android.hardware.drm-service.widevine -j128

Test: build_and_run_all_unit_tests.sh
  for hidl tests

Test: atest VtsAidlHalDrmTargetTest

Test:   atest vts_treble_vintf_vendor_test:vts_treble_vintf_vendor_test.DeviceManifest/SingleManifestTest#ManifestAidlHalsServed/0 -- --abi x86_64

Bug: 200055138
Bug: 170964303
Change-Id: I5654d90d8a4b0bae4b4a78e79b27c1cafec36be7

libwvdrmengine/aidl_include/Utils.h

@@ -0,0 +1,50 @@
+//
+// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+//
+
+#ifndef WV_UTILS_H_
+#define WV_UTILS_H_
+
+#include <aidl/android/hardware/drm/Status.h>
+#include <android/binder_auto_utils.h>
+
+#include <string>
+#include <vector>
+
+#include "log.h"
+
+namespace wvdrm {
+
+inline ::aidl::android::hardware::drm::LogPriority toAidlLogPriority(
+    wvutil::LogPriority p) {
+  switch (p) {
+    case wvutil::LogPriority::CDM_LOG_ERROR:
+      return ::aidl::android::hardware::drm::LogPriority::ERROR;
+    case wvutil::LogPriority::CDM_LOG_WARN:
+      return ::aidl::android::hardware::drm::LogPriority::WARN;
+    case wvutil::LogPriority::CDM_LOG_INFO:
+      return ::aidl::android::hardware::drm::LogPriority::INFO;
+    case wvutil::LogPriority::CDM_LOG_DEBUG:
+      return ::aidl::android::hardware::drm::LogPriority::DEBUG;
+    case wvutil::LogPriority::CDM_LOG_VERBOSE:
+      return ::aidl::android::hardware::drm::LogPriority::VERBOSE;
+    default:
+      return ::aidl::android::hardware::drm::LogPriority::UNKNOWN;
+  }
+}
+
+inline ::ndk::ScopedAStatus toNdkScopedAStatus(
+    ::aidl::android::hardware::drm::Status status) {
+  if (::aidl::android::hardware::drm::Status::OK == status)
+    return ::ndk::ScopedAStatus::ok();
+  else {
+    return ::ndk::ScopedAStatus::fromServiceSpecificError(
+        static_cast<int32_t>(status));
+  }
+}
+
+}  // namespace wvdrm
+
+#endif  // WV_UTILS_H_