Move misplaced return statement

In CallerInfoLookupHelper, if mQueryEntries already contains an entry
for a query, there's no need to issue the query again. The return
statement was mistakenly placed one level too low -- move it to the
correct place.

Change-Id: I096949888c56dd13dcd51d10f6baf9bf96d5f4a8
Fixes: 119298336
Test: manual