Update gesture nav tutorial with updated phone landscape layouts

- Updated layout files to support landscape mode on phones
- Updated All Set page to say "tablet" rather than "phone" on tablets
- Hiding feedback view during gestures for better visibility
- Renamed files and resources to say "tablet" rather than "foldable"
- Added custom layout logic for the mock hotseat on foldables
- Updated feedback view margins

Test: manual
Fixes: 215063763
Fixes: 206895841
Fixes: 219251891
Change-Id: I56f7f33dd0617bdeeca4863f7d5de0143376c8bf