Dynamically add/remove CallCardFragment

Only show the CallCardFragment when it is needed:

1) Incoming calls
2) After completion of circular reveal

Also make Calls class public so that it can be mocked with
Mockito

Change-Id: Ife7ed38bde25daf5a9fd0329ade5e794fa1bff65
10 files changed
tree: 0cc2cecc7c5dcca6afcc68d4f3ea768fdd1afbf1
  1. InCallUI/