Catch another exception when we are building slices data for search

We lose chance to build all Settings slices if we got an exception
when settings was creating slice data for controllers.
We should make sure the process goes well even we got an exception
on an incorrect controller.

Also, we log exceptions for each catch.

Bug: 131449561
Test: Open Settings search and then we can see slice for some
search result.

Change-Id: Iac9f0e0a187f6d10cf53886afeb9cab479b6ce02