Fix ProtoCoder NoSuchMethodException

[Suvrat1629]

Please add a meaningful description for your change here

Handles NoSuchMethodException in ProtoCoder.getParser() when getDefaultInstance() is unavailable by adding a fallback to instantiation.
Addresses #19713

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[Suvrat1629]

@damccorm Could you please take a look as this is for issue #19713

[damccorm]

Thanks for looking into this issue

@damccorm Could you please take a look as this is for issue #19713

It looks like Yi got assigned this PR by the bot, it is usually better to allow the bot to assign reviewers so that reviews are balanced.

[Suvrat1629]

@damccorm Oh ok I did not know the bot worked that way, I asked you for a review because you had opened the issue this pr was addressing.