androiddeployqt: Always overwrite user files

The Android files in the project should always overwrite the
equivalents in the template, even if the template files have
been modified after the project files. Otherwise an old project
could stop working when Qt was updated.

Task-number: QTBUG-35147
[ChangeLog][Android][QTBUG-35147] Make sure Android files in the
project always overwrite the equivalent files in the project
template.

Change-Id: I4c38061501cbcaa1061e376e7b49a1a0efe596cf
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>