Include DigitalWelllBeing banner in task XML to avoid addView during animation

- Also simplified DigitalWellBeingToast to be an actual View that is a children of TaskView
- Split out getDwbLayoutTranslations into 2 methods
  - One that update layout will be called earlier during TaskView.updateTaskSize. It now takes calcualted split snaphsot size and layoutParams sizes instead of using measured sizes so it can run before onMeasure. Also make sure updateLayoutParams is called.
  - One that calulate translations only can be called more frequently without causing jank during animation
- TaskView.updateTaskSize now always set the exact sizes as layoutParams instead of MATCH_PARENT, so we can use the values for updateDwbBannerLayout
- Simplified outline and splitOffsetTranslation calculations

Fix: 345789862
Fix: 362435532
Test: Presubmit and manually testing DWB banner in variaous configuration single/split real/fake portrait/landscape/fake
Flag: EXEMPT bugfix
Change-Id: Ibde877c5f983689e0ef8104ba344b5947d0e3948