Little change of readability in Title::secureAndSplit

Move init of mArticleId to bottom, where other fields are filled and
change ternary operator to a simple if for better readability.
Break a double assignment in two statements.

Change-Id: Ib61435e62e883142dd0c5dcb40e0e50e7ca18439
Merge "Little change of readability in Title::secureAndSplit"