Adb: use VLOG() to replace D() for verbose logging.

As there are too many D(), we can keep both VLOG() and D() now, and get
rid of D() gradually.

Change-Id: I2f1cb70bcab3e82c99fed939341d03f6b2216076
diff --git a/adb/file_sync_service.cpp b/adb/file_sync_service.cpp
index 8db9ca7..f588b40 100644
--- a/adb/file_sync_service.cpp
+++ b/adb/file_sync_service.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define TRACE_TAG TRACE_SYNC
+#define TRACE_TAG SYNC
 
 #include "sysdeps.h"
 #include "file_sync_service.h"