Add Assisted Dialing iconography to the incallui.

* Abstracts reference to telecom constant until available in the platform.
* Implements a new "Assisted Dialing" token/icon until final UX mocks are available.
* Adds unit test for outgoing call.

In a subsequent, related change:
* Modifications to fragments that contain contacts, the extra key will be inserted via call details to indicate the outgoing intent should use assisted dialing.

Bug: 64205446
Test: New Unit Test
PiperOrigin-RevId: 164788082
Change-Id: I5d388f7b6c4e55c42773d314d2417b6dbc38b972
7 files changed
tree: 165cace32991b7cc0883df0c32af7bb556d211ba
  1. assets/
  2. java/
  3. Android.mk
  4. AndroidManifest.xml
  5. LICENSE