[3/3] services/Telephony: Increasing Ringtone

      Option to set the incoming call ringtone volume to increase
      in pre-defined (user selected) increments.

Linked commit:
      Settings   - https://gerrit.paranoidandroid.co/#/c/447/
      Frameworks - https://gerrit.paranoidandroid.co/#/c/448/
Optipng -nc -nb -o7

Change-Id: I51b1d40a987a7f259a4d0f78f04c8f56afc27f2d

Conflicts:
	res/drawable-hdpi/ic_block_contact_holo_dark.png
	res/drawable-hdpi/ic_unblock_contact_holo_dark.png
	res/drawable-mdpi/ic_block_contact_holo_dark.png
	res/drawable-mdpi/ic_unblock_contact_holo_dark.png
	res/drawable-xhdpi/ic_block_contact_holo_dark.png
	res/drawable-xhdpi/ic_unblock_contact_holo_dark.png