Always hide blocked calls.

- Remove setting for show/hide.
- Remove utilities and behaviors for show/hide.
~ Continue filtering blocked call types in call log (which may be
marked by other applications.)
~ Change behavior after blocking call; instead of keeping the call
log entry but changing the type to BLOCKED, delete it instead.
+ Default behavior is now to delete entries and visual voicemails of
blocked calls.

Bug: 25378068
Bug: 25106387
Change-Id: I8cbc419b25cce6ba39099857cffe4eb1df9d0bef