ART: Fix nits

Follow-up to commit 3fec9ac0d5af1358d216eb2fdc2000ec0205f3f0.

Bug: 31338270
Test: m test-art-host
Change-Id: Ia50f450bef144167b946224c26242c529302996e
diff --git a/runtime/base/logging.h b/runtime/base/logging.h
index 26ab1f9..5f84204 100644
--- a/runtime/base/logging.h
+++ b/runtime/base/logging.h
@@ -26,8 +26,8 @@
 namespace art {
 
 // Make libbase's LogSeverity more easily available.
-using LogSeverity = ::android::base::LogSeverity;
-using ScopedLogSeverity = ::android::base::ScopedLogSeverity;
+using ::android::base::LogSeverity;
+using ::android::base::ScopedLogSeverity;
 
 // The members of this struct are the valid arguments to VLOG and VLOG_IS_ON in code,
 // and the "-verbose:" command line argument.