Move customization options to proper projects (3/3)

Move the customization options to correspondent projects, so that
WallpaperPicker2 only has wallpaper customization
ThemePicker has clock, color, customiztion etc.
WallpaperPickerGoogle has all customization options

Test: Manually tested it works as expected
Bug: 343300705
Flag: com.android.wallpaper.new_picker_ui_flag
Change-Id: I5f68b6afe3e3e99aea21c5866fbe187db7e1431a