Android: Make sure we're looking for .mo files in the right path

Summary:
QStandardPaths won't be giving us the file we need, instead just point at where
we know it's going to be.

Test Plan: Was able to run KAlgebra in catalan

Reviewers: Frameworks, ilic, ckertesz

Reviewed By: ckertesz

Subscribers: aacid, ltoscano, kde-frameworks-devel

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D14528