MTP: Improve MtpProperty logging support

Change-Id: I46800b99763edcc5e994d912941f9f5e9b1c94d2
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpProperty.h b/media/mtp/MtpProperty.h
index f783a87..06ca56e 100644
--- a/media/mtp/MtpProperty.h
+++ b/media/mtp/MtpProperty.h
@@ -94,6 +94,7 @@
     void                setFormDateTime();
 
     void                print();
+    void                print(MtpPropertyValue& value, MtpString& buffer);
 
     inline bool         isDeviceProperty() const {
                             return (   ((mCode & 0xF000) == 0x5000)