Did this by using the same query which is used to update the icon URLs
after updating the index. To make this same method accessible, without
causing sad database locking, had to expose the method from AppProvider
in a way which would let DBHelper access it. See comments in code for
further explainations.
While there, removed the final lint warning in my Android Studio for
the AppProvider. This was a warning because we could have ended up
iterating over a null object. Although it turns out there was a correct
guard in place which would ensure this didn't happen, it wasn't in such
a way that lint would understand. Thus, I changed the guard condition
around `for( String blah : CommaSeparatedList.make() ) {}` to let lint
relax and not be so pedantic.
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