Improve refreshing

Don't show the action bar spinner if the swipe refresh indicator can be shown
Show the swipe refresh indicator on the projects list (not manually refreshable)
Update Volley library
Don't use age searching in Gerrits below v2.9, fixes sync issues with CM and other Gerrits
The kind attributes of projects is not available any more (fixes a possible volley exception)

PS2: Check if fragment is attached before trying to indicate if it is refreshing

Change-Id: I3e1869e5b82e5e4c02b20e668183eede62526946
Merge "Improve refreshing"