adb: add tracing to file_sync_service.cpp.

Bug: http://b/31289465
Test: systrace
Change-Id: I186675ca0310ace0e1d35561fa0b910417dcedd7
diff --git a/adb_trace.h b/adb_trace.h
index 5206a99..aaffa29 100644
--- a/adb_trace.h
+++ b/adb_trace.h
@@ -58,4 +58,8 @@
 void adb_trace_init(char**);
 void adb_trace_enable(AdbTrace trace_tag);
 
+#define ATRACE_TAG ATRACE_TAG_ADB
+#include <cutils/trace.h>
+#include <utils/Trace.h>
+
 #endif /* __ADB_TRACE_H */