Support Desktop unminimize animations, and move app-state logic

- Support Desktop unminimize animations through
    1. keyboard alt-tab shortcut
    2. taskbar hotseat icon click (TaskItemInfo)
    3. taskbar running-app icon click (GroupTask)
- move taskbar running-app state logic from TaskbarViewController to
  TaskbarRecentAppsController.

Test: manual - ensure the transitions above cause unminimize animations
Bug: 369966334
Flag: com.android.window.flags.enable_desktop_app_launch_alttab_transitions

Change-Id: I20322bdf58bc69cff360bf26e533e0732d5297b9