Revert "Backgrounds: Update resource name to match AOSP changes in WallpaperPicker2"

See: "Use legacy name for partner wallpapers string array" (af6d4ba)

This reverts commit d2ff9ab92652509ccc2720ca92ba197521288aaa.

Change-Id: I91309d4a2aa5a0b35d461db391425ee8b2a4e565
2 files changed