Support switch to screenshot for TTV

- Moved live tile decision to TaskThumbnailViewModel, and added RecentsViewData for runningTask information
- Implemented a ThumbnailData override mechanism to override screenshot from TaskThunmbnailCache, the override will be added during switchToScreenshot and cleared when user exit recents (RecentsView.reset)
- During the thumbnail override, we wait until the new ThumbnailData propagates, before finsihing Recents animation to avoid a frame of flash

Bug: 343364498
Test: TaskThumbnailViewModelTest, TaskRepositoryTest, RecentsViewModelTest
Flag: com.android.launcher3.enable_refactor_task_thumbnail
Change-Id: I776943ecdfa0d65d94b054692297b42686f59f8a