Move string expansion outside localisation (H702)

String expansion should be done outside localisation call (_()),
otherwise there will never be a matching string found in the
catalogue.

Also enable gating on this Hacking check (H702).

Change-Id: Ie7c89fbfb52629e75d5e68e9afda8bcf50bf4cdd
Merge "Move string expansion outside localisation (H702)"