Dialer: Contact photo in call log can not change in time

When user changed contact's photo, call log will firstly use
cached photo.

Clear cache when data is changed.

CRs-Fixed: 525851

Conflicts:
	src/com/android/dialer/calllog/CallLogAdapter.java

Change-Id: I1c7c4ba34b3995371b478b2e8994d4fa56e54b68