Add legacy URL support for demo app deeplinking

[liviu-timar]

🎯 Goal

We should match both stream-calls-dogfood.vercel.app and pronto.getstream.io for the deep links as stream-calls-dogfood is used in some older recurring meeting series in Google Calendar.

Next step is to support the following case:

The idea is to not have “staging” / “production” anymore as both Pronto and Demo will eventually run on Production environments by default as we want to have production-level stability for internal meetings too

Both dogfooding and production flavors should handle all hosts? See issue here.

🛠 Implementation details

• Added new "legacy" host in .env.properties:

DOGFOODING_RES_CONFIG_DEEPLINKING_HOST=pronto.getstream.io
DOGFOODING_RES_CONFIG_DEEPLINKING_HOST_LEGACY=stream-calls-dogfood.vercel.app
DOGFOODING_RES_CONFIG_DEEPLINKING_PATH_PREFIX=/
PRODUCTION_RES_CONFIG_DEEPLINKING_HOST=getstream.io
PRODUCTION_RES_CONFIG_DEEPLINKING_HOST_LEGACY=
PRODUCTION_RES_CONFIG_DEEPLINKING_PATH_PREFIX=/video/demos/

Also added new line in env.properties.sample and readme.md.

• Added new intent-filter for DeeplinkingActivity with legacy host. For production, the legacy host is empty and will not match any URIs.

• Changed the label that the user sees when the app chooser appears after scanning a code, from "call_link" to "Join video call" (see below).

🎨 UI Changes

🧪 Testing

• Test by scanning the QR codes from:
  • https://getstream.io/video/demos/?id=123 - prod
  • dogfooding URLs don't show QR codes
• Test with the Android App Links Assistant in Android Studio with:
  • https://getstream.io/video/demos/?id=123 - prod
  • https://pronto.getstream.io/join/123?id=123 - dogfooding
  • https://stream-calls-dogfood.vercel.app/join/123?id=123 - dogfooding legacy
  • Replace hosts and pathPrefixes in AndroidManifest with hardcoded strings for the first time for the build configurations to get created.

[skydoves]

Looks good to me 💯