Move MTP code to the android namespace

Change-Id: I5da48038fd5e4cdeefaeba42cdc74eb588b3448d
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpStorage.cpp b/media/mtp/MtpStorage.cpp
index bbdef51..d4de819 100644
--- a/media/mtp/MtpStorage.cpp
+++ b/media/mtp/MtpStorage.cpp
@@ -27,6 +27,7 @@
 #include <stdio.h>
 #include <limits.h>
 
+namespace android {
 
 MtpStorage::MtpStorage(MtpStorageID id, const char* filePath, MtpDatabase* db)
     :   mStorageID(id),
@@ -133,3 +134,5 @@
     closedir(dir);
     return 0;
 }
+
+}  // namespace android