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)

Change-Id: I3e1869e5b82e5e4c02b20e668183eede62526946