firebase apps:sdkconfig non-interactive output misleads, says "has multiple apps" when there are 0 apps

[waded]

[REQUIRED] Environment info

firebase-tools: 9.22.0
Platform: Mac

[REQUIRED] Test case

[REQUIRED] Steps to reproduce

• Create new firebase project, e.g. named "a-project-with-no-apps"
• firebase use a-project-with-no-apps
• firebase apps:sdkconfig web --json

[REQUIRED] Expected behavior

The JSON output indicates "Project a-project-with-no-apps has no apps. Create an app first." or similar.

[REQUIRED] Actual behavior

Output for this example project "a-project-with-no-apps" is:

{
  "status": "error",
  "error": "Project a-project-with-no-apps has multiple apps, must specify an app id."
}

which is misleading - the command can't produce output in this non-interactive mode because there are 0 apps, not multiple apps.

[waded]

I'll file bug against Firebase UI example steps that led to discovering this misleading error message; I removed mention here.