Keep the tertiary button align be the same as bc style(central_horizontal). am: d198d8ea75

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/setupdesign/+/18580228

Change-Id: I65340cf3a431c766a0755957bfbaa07113c1b960
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>