Add back call stats feature.

Change-Id: Id10bc12cacaee3523b7614bce8493d8b423b3f40

Improve callstats number matching code.

Make it a little more efficient, and make sure the ContactInfo and
CallStatsDetails instances always stay in sync.

Change-Id: I0b01e6fc036ce70dccbccf1d9002843331304d50

Dialer: Make the call stats spinner match the other actionbar theming

Change-Id: I9bb5a1e344aa33c4651a20f37875bbed8f3bd9e3