InCallUI: Blacklist support

Base: https://gerrit.omnirom.org/#/c/5668/
telephony: https://gerrit.omnirom.org/#/c/6347/
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: I38e3f38ec4a773485c065d258e1ab5d40b9ddd53

[3/7] InCallUI: Blacklist permission

Change-Id: I8f873376700843b4560ca12b58470767ff2068c0

Conflicts:
        res/values/strings.xml
        src/com/android/incallui/CallButtonFragment.java
        src/com/android/incallui/CallCommandClient.java

        modified:   AndroidManifest.xml
        new file:   res/drawable-hdpi/ic_block_contact_holo_dark.png
        new file:   res/drawable-hdpi/ic_unblock_contact_holo_dark.png
        new file:   res/drawable-mdpi/ic_block_contact_holo_dark.png
        new file:   res/drawable-mdpi/ic_unblock_contact_holo_dark.png
        new file:   res/drawable-xhdpi/ic_block_contact_holo_dark.png
        new file:   res/drawable-xhdpi/ic_unblock_contact_holo_dark.png
        modified:   res/layout/call_button_fragment.xml
        modified:   src/com/android/incallui/CallButtonFragment.java
        modified:   src/com/android/incallui/CallButtonPresenter.java
        modified:   src/com/android/incallui/CallCommandClient.java