Add support for static entries for settings search.

Now that we've added ids for static entries, we can use that to support
indexing removal & highlighting.

Note that the highlighting works for static entries with this CL, but
for some reason not the scrolling. I've opened b/279149620 to
investigate, I believe this might be related to b/270929985#comment8.

Bug: 278872430
Test: manual
Change-Id: I4a702bccca013bc3f7a506665f3212e5762504ae