Implement the QS footer actions in Compose (1/2)

This CL reimplements the FooterActions in Compose. This is going to be
one of the first features to be hidden behind a build time flag in our
SystemUICompose build once that flag is available.

See http://b/242040009#comment20 for a video and http://ag/20745047 for
the screenshot difference between the Compose and View implementations.

Bug: 242040009
Test: atest FooterActionsScreenshotTest
Change-Id: I83df8d191c1ab5d95466471c834ac1b0903ad21a