Make the retrival of themed icon setting in background again

We get the themed icon setting through content provider through binder
call in background thread to unblock UI.
Video:
  - https://drive.google.com/file/d/1d3SxhKTCJtWLtD1vri9qioKvGdZC42ne/view?usp=sharing&resourcekey=0-0r9WI28xLgMaQzRxkQJU_g

Bug: 189894912
Bug: 190564428
Test: Manual
Change-Id: I23321d227df9115839b6fcc9a0c7bb8eb10c1278