plugins#1514: [firebase_remote_config] Initial integration tests

plugins#815: [google_maps_flutter] adds support for custom icon from a byte array (PNG)

plugins#1229: [google_maps_flutter] Marker APIs are now widget based (Android)

plugins#1421: [in_app_purchase]make payment unified APIs

plugins#1380: [in_app_purchase]load purchase

flutter#26329: IAP: Purchase an auto-renewing subscription

flutter#26331: IAP: Purchase a non-renewing subscription

flutter#26326: IAP: Load previous purchases

plugins#1249: [in_app_purchase] payment queue dart ios

flutter#26327: IAP: Purchase an unlock