Don't load resource drawables just to compare them

Resource IDs are stable and `Icon` class does a good job comparing them. Don't load drawables just to figure out that a resource with same ID in same package is actually the same thing.

Bug:421974887
Flag: EXEMPT bugfix
Test: presubmit
Change-Id: Id8c05e0554955540b20676769ac776b18f4d0a7f