Log contacts screen events to clearcut 1/2

* Allow the ContactsApplication to be exteneded
* Add an abstract Logger class to be the primary
  utility to log events. Currently it goes to both
  clearcut and google analytics (like Dialer).
* Fix a broken intent in the all intents test
  activity.

Bug 18388581

Change-Id: I8f2d555b06484fecc2fdb6517847c12a0874fd2f