Fix bug that showing block option for private number.

This happens when the number exists in call log, which usually shouldn't happen but some OEMs may have different behavior. Adding an additional check to align it with call action so block option won't show up if the number is not callable.

Bug: 79202933
Test: verified on LG device.
PiperOrigin-RevId: 195480184
Change-Id: Icde5f5b0914b2198d9031d188b22a65d6a3085cc