MTP: Fix ownership and file permissions for transferred files and folders

All new files and folders are created with group sdcard_rw
Permissions for new files are 0664 and directories 0775

Change-Id: I6d508231150f687e2e529112fd47f10e30fa594f
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/mtptest.cpp b/media/mtp/mtptest.cpp
index 9062494..af0f77f 100644
--- a/media/mtp/mtptest.cpp
+++ b/media/mtp/mtptest.cpp
@@ -27,6 +27,7 @@
 #include "MtpServer.h"
 #include "MtpStorage.h"
 #include "f_mtp.h"
+#include "private/android_filesystem_config.h"
 
 using namespace android;
 
@@ -76,7 +77,7 @@
     enable_usb_function("usb_mass_storage", false);
     enable_usb_function("mtp", true);
 
-    MtpServer   server(fd, "/data/data/mtp/mtp.db");
+    MtpServer   server(fd, "/data/data/mtp/mtp.db", AID_SDCARD_RW, 0664, 0775);
     server.addStorage(storagePath);
     server.scanStorage();
     server.run();