Remove hidl support.

Merged from http://go/wvgerrit/161857

Test: streaming(Netflix, Play Movies & TV)
Test: ./build_and_run_all_unit_tests.sh
Test: adb shell ps | grep drm
Test: metrics_dump
Test: hardware/interfaces/drm/aidl/vts$ atest VtsAidlHalDrmTargetTest

Bug: 259299992
Change-Id: I76bcc82bbfb3fc60987b66265a580946a16c341d

libwvdrmengine/cdm/util/src/log.cpp

@@ -23,11 +23,7 @@
 
 #include "log.h"
 
-#ifdef IS_HIDL
-#  include <hwbinder/IPCThreadState.h>
-#else  // AIDL is the default
-#  include <android/binder_ibinder.h>
-#endif
+#include <android/binder_ibinder.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <sys/time.h>
@@ -80,12 +76,7 @@ void ClearLoggingUid() {
 uint32_t GetLoggingUid() { return tl_logging_uid_; }
 
 uint32_t GetIpcCallingUid() {
-#ifdef IS_HIDL
-  const auto self = android::hardware::IPCThreadState::selfOrNull();
-  return self ? self->getCallingUid() : UNKNOWN_UID;
-#else  // AIDL is the default
   return AIBinder_getCallingUid();
-#endif
 }
 
 void InitLogging() {}