Revert "Use wallpaper colors for widgets in wallpaper change preview"

Revert "Implement generateColorsOverride from LocalColorExtractor"

Revert submission 15331418-colorcp

Reason for revert: Broke the build
Reverted Changes:
Ife80b07f9:Use wallpaper colors for widgets in wallpaper chan...
I1371eb787:Implement generateColorsOverride from LocalColorEx...

Bug: 194138049

// Using original change's merged-in tag to avoid clashing
Merged-In: I3fb76b6036cb909771b789eac15742df78c2c742
Merged-In: I4da9ad1cc88be251f97e86b6c8c9b346ed20f586

Change-Id: I3835dfb8efe745dc0a654712a5b1f68c4946f446