Fix for DPS crashing on Printer Info icon

This issue is occurring because DPS calls a network operation
in the main thread. We have added a fix to offload that network
call to the background thread while calling the UI elements in
the main thread.

Test: Go to Settings->Connected devices->Connection preferences->
Printing->Default Print Service - Add Printer->
Wi-Fi Direct printing->Find Wi-Fi Direct printers->
Add a Wi-Fi Direct printer, once added it will bring you back
to the first page, tap on printer info icon
Signed-off-by: Saurabh Chauhan <mopriadevteam@gmail.com>

Change-Id: Idb2a1e08583052255a471c4553f8bbee1ccb003f
1 file changed