Phone: Add summary to block private numbers functionality

This commit adds a summary text to the block private numbers
functionality to avoid ugly ellipsizes in languages where the
translations get longer (e.g. German).

PS 2 : Fixed Derp

Change-Id: I2ce7659d5f721368000dca254f9d1a2e01ea8379
Fix Logical Error

Change-Id: Ie103a8b45ec2489cdbd1a01e991646216258aace
Fix up 'add to blacklist' button behaviour

- Don't crash in landscape, as button isn't present in landscape layout
- Only show it for incoming calls with number (it makes no sense to
  blacklist outgoing calls, and calls without number can't be
  blacklisted on a per-call basis anyway)

JIRA: CYAN-865
Change-Id: Ie98e09abc4f4e62e67ccf12322e2a0cea0e26d60
Fix Translation Derps

Change-Id: I6b104b3a9be0d06fb7857d288ad24c6bea498072

Conflicts:
	res/values-es/strings.xml