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/Android.mk b/adb/Android.mk
index 5786d18..4ee1ced 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -37,6 +37,7 @@
     adb_auth.cpp \
     adb_io.cpp \
     adb_listeners.cpp \
+    adb_trace.cpp \
     adb_utils.cpp \
     sockets.cpp \
     transport.cpp \