Remove locale checking for indexing.

Remove the the indexing check for the
index data's locale to match the locale of
the device. We don't require locale for
indexables, and we reindex on locale change.

It had introduced a bug where when locale
changed, the default us-en results would
not be added to the db.

Change-Id: I43a4284f5c23bc51ee3efdfcabe511eac2d3317d
Fixes: 66916397
Fixes: 68380443
Test: robotests