Contacts: Add support for Blacklist

Requires http://review.cyanogenmod.org/#/c/34904/

Change-Id: Ibc07f5749b7adcc08f106012ba22ae866d004921
Make contacts app aware of phone blacklist setting (3/3)

Change-Id: I46935ca140098ca3f1c1d714ac4a406dd9d7f52e
Allow blacklisting numbers from the call stats details menu.

Change-Id: I840c382afb561805fd74cbd696a80d3bca4be041
JIRA:CYAN-910
Store phone blacklist in content provider (3/4)

Change-Id: I7b42e872b1ccaba7eff6f6c4903e8a3612aa8375
Enable contact photo preloading.

Avoids the delay occuring otherwise when checking into call details.

Change-Id: Ie48285bb03fde0434429079f141ec57dc75a65b9
Hide 'set default' checkbox if it's not going to be looked at next time
anyway.

Change-Id: I2eb5559c3c0b61481d4f526b2198fd0372163d65