CallStyle: Add booleans to control new action layout

This is a UX bug fix, so it's not going through the full flag process,
but we'd still like a way to disable it quickly if it causes problems,
and to disable the more chatty debug messages once it's stable.

Bug: 268733030
Test: none, it just adds two variables
Change-Id: Ib10999405edbaee49b54cf4ec73857afbdae67e9