change(fcm): Deprecate sendToDevice and sendToDeviceGroup and their response classes#2090

Doris-Ge merged 2 commits intomasterfirebase/firebase-admin-node:masterfrom

remotes/dorisge/deprecate-legacy-send-apisfirebase/firebase-admin-node:remotes/dorisge/deprecate-legacy-send-apisCopy head branch name to clipboard