Dialer: fix force close in call detail activity

When enter call detail of one call log without any contact, dialer force
close will happen. The reason is that contact uri is null by looking up
lookup-uri, in this case query contact info will throw exception.

We will not query contact info if no contact related with this call log.

Change-Id: I8cd4993d6cc7c4661b0af18cff83cea6e3e46dfb
CRs-Fixed: 744831