Revert "InCallUI: Port "Add to blacklist" support to in-call ui (1 of 2)"

This reverts commit 18c5106ae42eebd0730e6a1557fdf626f0e32636.

Conflicts:

	src/com/android/incallui/CallButtonFragment.java
	src/com/android/incallui/CallCommandClient.java

Change-Id: I8ee2348c3f411ea809943d0ac90d3b4cafbe66c1