Base: Blacklist support

telephony: https://gerrit.omnirom.org/#/c/6347/
InCallUI: https://gerrit.omnirom.org/#/c/5669/
Mms: https://gerrit.omnirom.org/#/c/5671/
Settings: https://gerrit.omnirom.org/#/c/5011/
TelephonyProvider: https://gerrit.omnirom.org/#/c/5012/
Telephony: https://gerrit.omnirom.org/#/c/5010/

Change-Id: Ic5a59be11f76b4a9eba075d9c3525086b3ee389e
Blacklist permission

There is no permission check for blacklist.
So any app can edit the blacklist.
Add a system-only permission to prevent this.

Change-Id: I1d817e7127bb892aa6f4d4b22fdfd3efb4baa3fa

Conflicts:
        core/res/AndroidManifest.xml
        core/res/res/values/custom_strings.xml

        modified:   core/res/AndroidManifest.xml
        new file:   core/res/res/drawable-hdpi/perm_group_security.png
        new file:   core/res/res/drawable-mdpi/perm_group_security.png
        new file:   core/res/res/drawable-xhdpi/perm_group_security.png
        new file:   core/res/res/drawable-xxhdpi/perm_group_security.png
        new file:   core/res/res/values/custom_strings.xml
Settings: Add Blacklist storage

Change-Id: I963d8322bc5af3313cf960a0343163382f8d125b

Conflicts:
        core/java/android/provider/Settings.java

        modified:   core/java/android/provider/Settings.java