OPP: Send proper share status of file once transfer is complete

Use Case:
1. Select >15 files from DUT and try to transfer it to
   already paired device. Some file are of very small size.
2. Check whether all files received or not

Failure:
File transfer fails in between.

Fix:
Share status of the file will be sent with MSG_SHARE_COMPLETE to
avoid sending the file again during batch transfer. Otherwise, if
DUT is sending batch containing small files transfer will be completed
immediately and status may not be updated to correct state. This will
lead to sending of same file again and transfer will fail because file
info is already removed from the hashmap of pending shares.

Change-Id: Ibbb0d44b72796af4844ae6289ba8182b4bbd4445