Fix for bug 2879253.

The shortcut limiting has been removed from ShortcutRepository, as it is done later
by ShortcutPromoter anyway. Limiting the shortcuts in ShortcutRepository means that
(for example) if have have loads of voice search shortcuts in the log, we only
return these from ShortcutRepository evenm though there may be other shortcuts too.
Then when we filter the shortcuts, all but 2 shortcuts get removed by
ShortcutPromoter, leaving just 2 shortcuts left.

Change-Id: I6413d82f9051bb64487c65817bfbcdea0f0c3097
10 files changed