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

Bug: 200055138
Bug: 170964303
Change-Id: If2f2a129914436ba5cef1c46f6cb9415e12c3d1c

libwvdrmengine/level3/src/level3_file_system_android.cpp

@@ -3,6 +3,7 @@
 #include <errno.h>
 #include <stdio.h>
 #include <sys/stat.h>
+
 #include <cstring>
 #include <string>
 
@@ -33,7 +34,7 @@ OEMCrypto_Level3AndroidFileSystem::OEMCrypto_Level3AndroidFileSystem()
     base_path_[pos] = '\0';
     if (mkdir(base_path_.c_str(), 0775) != 0 && errno != EEXIST) {
       wvutil::Log(
-          "", "", 0, wvutil::LOG_ERROR,
+          "", "", 0, wvutil::CDM_LOG_ERROR,
           "Could not create base directories for Level3FileSystem, error: %s\n",
           strerror(errno));
     }