Inflate layout preview for work profile

Also fix a bug which LivePreviewCells are not used in full widgets
sheet.

Test: Temporarily replace the previewLayout with initialLayout
      from the code. Then, open both the full and bottom widgets
      sheet. Observe initial layout is rendered correctly for both
      personal and work profile.

Screenshot: https://screenshot.googleplex.com/BgJycVjzeoU3PNf.png

Bug: 181061277
Change-Id: Id635ee778008b6f94009f50bf4373d3b0f545417