Merge "Remove new task flag when launching unicorn enrollment." into sc-dev...

Merge "Remove new task flag when launching unicorn enrollment." into sc-dev am: afe9dad1 am: dfb01e07 am: 07f5bb60 am: 929cbfaa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15521773

Change-Id: Icd532ee6cada0702bdd6426f8516a0ba21c3cc1b