MTP: Add support for multiple properties in GetObjectPropList command

Change-Id: Ib469a6c8141937aaa3e811345056195117abb4b2
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpProperty.cpp b/media/mtp/MtpProperty.cpp
index 42945f5..4356a6f 100644
--- a/media/mtp/MtpProperty.cpp
+++ b/media/mtp/MtpProperty.cpp
@@ -53,7 +53,7 @@
         mDefaultArrayValues(NULL),
         mCurrentArrayLength(0),
         mCurrentArrayValues(NULL),
-        mGroupCode(-1), // disable multiple properties in GetObjectPropList for now
+        mGroupCode(0),
         mFormFlag(kFormNone),
         mEnumLength(0),
         mEnumValues(NULL)