issue3070

Prerequisite

• Add google-services.json
• enable Cloud Firestore from Firebase console

How to use

• Run the app
• Click "Add 100 MB to DB" button for 4-5 times with pause, this is to insert 400-500MB worth of data. The button cannot insert 500 MB as a whole to avoid write stream exhaustion.
• After inserting, click "Query 400 MB" button to retrieve around 40 users each has 10 MB equalling to 400 MB.
• Querying will fail and RESOURCE_EXHAUSTED error is encountered.