Revert "Use aidl interface for Widevine service."

This reverts commit 96a8ccd4a1.

Reason for revert:
Could break DeviceManifest/SingleManifestTest#ManifestAidlHalsServed

Bug: 200055138
Bug: 170964303
Bug: 217241995
Change-Id: I9c42df15defec428c9ef8c62439c63d4a603fee6

libwvdrmengine/aidl_src/WVCreatePluginFactories.cpp

@@ -1,25 +0,0 @@
-//
-// Copyright 2022 Google LLC. All Rights Reserved. This file and proprietary
-// source code may only be used and distributed under the Widevine License
-// Agreement.
-//
-
-#include "WVCreatePluginFactories.h"
-
-namespace wvdrm {
-namespace hardware {
-namespace drm {
-namespace widevine {
-
-std::shared_ptr<WVDrmFactory> createDrmFactory() {
-  return std::make_shared<WVDrmFactory>();
-}
-
-std::shared_ptr<WVCryptoFactory> createCryptoFactory() {
-  return std::make_shared<WVCryptoFactory>();
-}
-
-}  // namespace widevine
-}  // namespace drm
-}  // namespace hardware
-}  // namespace wvdrm