Fix flash when setting photo as wallpaper

1.Hide the workSpaceSurface if the surface isn’t created.
2.Assign to background color if placeHolderColor is wrong.

Videos:
  - Before: https://drive.google.com/file/d/1J-DYMjv-NKM_5FLv0mI-PfpiNk-uVprr/view?usp=sharing&resourcekey=0-wDM3vTXJptH3ZKpcFB8oZQ
  - After: https://drive.google.com/file/d/1HRw9rVkwKw_5Sr7DoPiIVG8ccgDpsoGy/view?usp=sharing&resourcekey=0-c_VjQBem_WgqGPPBY8R5xw

Bug: 197564856
Bug: 197827700
Test: Manual
Change-Id: I6709fc5ad304eb4caec5006c17094c71676e2e1d
Merged-In: I6709fc5ad304eb4caec5006c17094c71676e2e1d
2 files changed