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
Dialer: Hide "Add 2-sec pause" and "Add wait" if phone number is empty

There is no operation to hide "Add 2-sec pause" and
"Add wait" options.

When the phone number is empty, hide "Add 2-sec
pause" and "Add wait" options.

CRs-Fixed: 537440

Change-Id: Ia799e11808e57919f471437021e7d6d62edea07c