Fixed IllegalArgumentException: Unterminated quote

[grzesiek2010]

Closes #1774

What has been done to verify that this works as intended?

I hardcoded a wrong string and tested if we can store an empty string if an exception curred and I didn't notice any problems.

Why is this the best possible solution? Were any other approaches considered?

I remember that there was a similar issue a few months ago... in the Hindi language probably and @shobhitagarwal1612 has fixed it using Transifex. Now it's in another language so we should handle such a case on the Collect side since it's hard to analyze all new strings from Transifex (but looks like we should analyze at least those we use as patterns for dates).

Are there any risks to merging this code? If so, what are they?

I tested using an empty string in such a case and everything was ok but that empty string is the one thing I can find dangerous.

Do we need any specific form for testing your changes? If so, please attach one.

No.

@lognaturel it's in values-mr and we probably should fix it too.
https://github.com/opendatakit/collect/blob/master/collect_app/src/main/res/values-mr/strings.xml#L177 a few wrong strings.

[lognaturel]

Thanks @grzesiek2010, this is certainly much better than a crash. I fixed the mr translation in Transifex and messaged the lead translator for the language so that will be updated when we do the next release.