This removes some dependency on FloatingHeaderView, making it
easier to replace
Bug: 234008165
Test: Verified that the UI does not change
Change-Id: I363c98c23f84fe570ea9cb1a40128359f5b67c9f
Removing sections in all-apps during transition and treating
it as a single unit
Bug: 175137718
Test: Manual
Change-Id: I55a501d80b5903f1a9d92a26b3784784fd9e50fd
Now floating headers get 2 interpolators: one for the header content
itselt, and one for the all apps content that follows. That way, they
can choose to intperolate part of their content as if it were part of
all apps instead of the header. Currently, we do this to animate
predicted icons quickly, followed by the all apps icons, predictions
text, all apps scrollbar, and all apps divider as you continue swiping.
Bug: 132455160
Change-Id: Ib3e373c291e174e1306a53854d0ad4dc29eb4b76