OPP update

Rewrite provider permission to allow LiveFolders work
Support file:// uri to share file
Support multiple share from gallery
Fully support sending file queue
Hold incoming connection for a while when OPP is busy instead of reject directly
Move notification update to a thread
Handle many error cases to display correct error messages
Improve server/client timeout
Delete empty file after reject incoming file
Support upper case incoming file extension
Avoid multiple mediascanner connections