Connect to File Transfer Client in Unity

[ApolloZhu]

Changelog

• Added FirebaseFirestore and FirebaseStorage unity packages (version 8.8.0) as dependencies
• Updated Android build identifier to match Firebase configuration
• Implemented API for interacting with File Management Firebase backend:
  • A function to add text entry (for OCRed text)
  • Callback for responding to database updates (for dashboard), with a sample implementation that just logs changes
  • A function for getting download handle (so each file type can choose how to download)

Known Issues

• You might see "Failed to update Android SDK package list. See the Console for details" when trying to compile due to Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema. This seems to be a bug with Unity and can be fixed by following this stack overflow solution.
• Unity complained about duplicate dependencies. Solved using pickFirst mentioned in android getting error at run time More than one file was found with OS independent path 'lib/x86/libjsc.so' wonday/react-native-pdf#432. However, this might indicate underlying issues with how dependencies are imported.

Notes for Reviewer

This is again a gigantic PR 😢 but most files are just dependency binaries 🤔. You can focus on:

• Main
  • Boardless/Assets/Scripts/FirebaseServices.cs: code for interacting with Firestore database and file Storage
  • Boardless/Assets/Scenes/FirebaseServicesTest.unity: a basic scene for quickly testing FirebaseServices
• Configs
  • Boardless/Assets/Plugins/Android/launcherTemplate.gradle: workarounds for known issues
  • Boardless/Assets/Plugins/Android/gradleTemplate.properties: Android Resolver Properties wants to have this file once I added the above grade config, not sure why but okay
  • Boardless/ProjectSettings/ProjectSettings.asset: Android bundle identifier.
• Resources
  • Boardless/Assets/google-services.json: Firebase constants
  • Boardless/Assets/Plugins/Android/Firebase.androidlib/res/values/google-services.xml

    Generated using Assets/Firebase/Editor/generate_xml_from_google_services_json.py -i Assets/google-services.json -o Assets/Plugins/Android/Firebase.androidlib/res/values/google-services.xml

Why the Delay?

• No print debugging, don't know what exactly is going wrong. Had to read the source code of our open source dependencies--insightful but time-consuming.
• Confused by an outdated issue saying Firebase Unity SDK doesn't work on devices not having Google Play Services Support Firebase SDK on devices without Google Play Services firebase/quickstart-unity#223, despite decoupling is already completed for the ones we need. Spent time trying out other 3rd party libraries without success.
• macOS Monterey no longer ships with Python 2 and causes the Firebase plugin to not generate the necessary configuration files, as tracked in macOS Monterey < 12.3 = Python 2 deprecation popup | macOS Monterey >= 12.3 = Python error firebase/firebase-unity-sdk#154. Fixed by manually converting and configuring the missing XML file using Failed to read firebase options firebase/quickstart-unity#677 to the desired location documented in https://firebase.google.com/docs/unity/troubleshooting-faq

[penpenLoveUwU]

LGTM

[ApolloZhu]

The MVP branch (WIP) confirmed this to be working, yay!