Clean-up QS footer actions initialization

This CL cleans up the trivial removal of the View implementation of the
QS footer actions that was made in http://ag/27576275.

Bug: 293569320
Test: atest QSImplTest
Test: Manual, verified that the QS footer actions display correctly and
 that b/299104543 was not happening.
Flag: NONE code cleanup
Change-Id: I76349d8616774bc2a89be6cb19e1cd619d596ab2