Fixes for devices with internal FAT file system:

Only share a single partition via UMS if a specific partition
is specified in vold.fstab (rather than "auto")

Do not fail to reformat if MBR cannot be found.

Change-Id: I544ca2ee325c308af656ab9f4732c788a964c156
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/Volume.h b/Volume.h
index 383c2e4..f81afff 100644
--- a/Volume.h
+++ b/Volume.h
@@ -71,6 +71,7 @@
 
     virtual int handleBlockEvent(NetlinkEvent *evt);
     virtual dev_t getDiskDevice();
+    virtual dev_t getShareDevice();
     virtual void handleVolumeShared();
     virtual void handleVolumeUnshared();