Fix full static/live wallpaper preview card is with wrong ratio in RTL language

Root cause: String#format updated the ratio string in system language, so the full preview card failed to set screen aspect ratio.
Video: https://drive.google.com/file/d/13XRpElgKkYylXxelhSnpQYX0G__oiUTt/view?usp=sharing

Also cleanup for LivePreviewFragment

Test: Manually
Fixes: 160383411
Change-Id: I0a3781b1be7ceb527326bbc97cd96594ee5f621f
3 files changed