Remove onboarding flow

Straight revert of all onboarding flow related CLs -
the onboarding flow is not needed for now as the Dialer 
will always at least be the system dialer.

Bug: 25020847
Change-Id: Ic1c5020b9b423de50801485f764209b21d5d7f33
26 files changed
tree: 17ef53f0aa4188fff3215cc124314293813311e1
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags