CallStyle now supports contextual actions (e.g. smart replies)

* This required that call style also has a collapsed state which has no actions.  Removing actions from the collapsed state resolves a bunch of bugs that were being introduced.  There's just too much of SystemUI that assumes collapsed notifications don't have actions to fix this right now.
* To make the collapsed state match stylistically, I also had to remove the progress bar from that state for vertical space reasons.

Bug: 179178086
Test: atest NotificationTemplateTests
Test: visual inspection ; expand/collapse
Change-Id: I6bc865d5fca8459ffaa6031d220d8bfa08545d89