Dialer: Cleanup CAF additions

Change-Id: I25cad862b009b75d332ece9a53bdcefdb75c0e11
Readd removed AOSP string

This string seems to be still used in some layouts,
it was removed when merging commits from CAF.

Build was not broken because it used the translated strings.
Add it back to be on the safe side.

Change-Id: I5bc0909d02685da9cac4fe0ea50429a0011f4182
dialer: Add blacklist provider permission

Change-Id: I5882c260c6104424d79af0954e79a37c92175002
JIRA: CYAN-3727
Issue: https://jira.cyanogenmod.org/browse/CYAN-3727
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>