Adding 1000 entry limit to number of call logs shown.

Reduces the time to show call logs since every entry must be looked
at for aggregation.  For people with a large amount of calls, this
improves load time by ~30% for 5k entries and ~50% for 10k entries.

Bug: 6849968

Change-Id: I84dd70b3705811f381f677596f1c19345cf218db