Revert "Allow back to be pressed while in incoming call screen"

This reverts commit bd9ccd501ebd83508dfe52121e0f4827cc6e1fa3.

Bug: 18742942
Change-Id: I8016ddae8addb56b4d6350748628fec351e6531a
1 file changed
tree: a5aba26936b74126fc81ed00e14b292424477725
  1. proguard.flags
  2. res/
  3. src/