Apply theme color and fade-in transition effect at

the top of One-handed mode

1. Implement the Dynamic color theme at the top Tutorial area
but the color should not be the same as the recents UI.

2. Do not translate Tutorial icon & text vertically, then provide
quick subtle fade-in effect for Tutorial window.

3. Apply new icon for tutorial.

Bug: 193126258
Bug: 193589897

Test: Local verify when changing dark theme and wallpaper theme.
Test: Local verify Tutorial icon & text fade-in effect.
Test: atest SystemUITests
Test: atest WMShellTests
Test: Perfetto check enter & exit performance
Change-Id: I60f4e7a709f3a27fe6c7f480f1012caccdbbe5ec