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
6410821f04