All apps can now be dismissed via the scrim or swiping down. To properly
behave as an AFW, the apps view can no longer be within the taskbar's
layout, and will instead add and remove itself from the drag layer.
Test: Manual
Bug: 204696617
Change-Id: I86a0ffc06faa653c65b3797a57ba6512c6874221
The current AllAppsContainerView has been split into a base class and a
subclass for activities. The base class allows using all apps with an
activity context. A-Z and work profile tabs are supported, but search
and the hotseat still require an Activity.
Test: Manual. All apps should work the same.
Bug: 204696617
Change-Id: I3b146714bc11b3b3555d97623aab5d78ac836482