Add missing strings for FCM V1 to resx file

[pmngo]

Things to consider before you submit the PR:

• [X] Are tests passing locally?
• [X] Are the files formatted correctly?
• [X] Did you add unit tests?
• [X] Did you test your change with either the sample apps that are included in the repository or with a blank app that uses your change?

Description

The error messages for FCM V1 are missing from SRClient.resx. Then the SRClient.Designer.cs file is regenerated, the associated properties are removed as a result. This PR fixes the issue by adding the strings to the resx.