R1:29957d196bb1

Fix some more setIcon() issues

Summary: Fixes T11569. This fixes a known bad `setIcon()`. I also looked for more calls to `setIcon()` without success, and stubbed `setIcon()` so we're in good shape even if more exist.

Test Plan:
- Grepped for `setIcon(` and manually inspect all 1,004 callsites to look for calls on `PHUIObjectItemView` objects.
- Grepped for "high risk" callsites (`setIcon` in file after `PHUIObjectItemView`) and re-examined them. I identified these files with this command:

```
git…