Enable image wallpaper scaling by default

So user can scale image wallpaper on the both mid-size and full preview
card, even can scale while animating.

Video: https://drive.google.com/file/d/1QuvwfufeD3NNe6aPVAQub-IkKCgYQ80X/view?usp=sharing

Fixes: 188178976
Test: Maunally
Change-Id: I5ad44212b4e0fc51c2d0ec20d013f5680c0a020b
2 files changed