Port call transfer feature from DialerNext to AOSP Dialer

Change-Id: I088b2cc8ce7c55f527d086f5827eac59cc3ca6c8
Issue-Id: CYNGNOS-1010
11 files changed
tree: ea8db94b75bf3b692c6112904b360ced0772ed9f
  1. res/
  2. src/
  3. tests/
  4. proguard.flags