New feature flag with ability to migrate GV1 groups

ts/RemoteConfig.ts

@@ -7,11 +7,14 @@ import { WebAPIType } from './textsecure/WebAPI';
 type ConfigKeyType =
   | 'desktop.cds'
   | 'desktop.clientExpiration'
+  | 'desktop.disableGV1'
   | 'desktop.gv2'
   | 'desktop.mandatoryProfileSharing'
   | 'desktop.messageRequests'
   | 'desktop.storage'
-  | 'desktop.storageWrite';
+  | 'desktop.storageWrite'
+  | 'global.groupsv2.maxGroupSize'
+  | 'global.groupsv2.groupSizeHardLimit';
 type ConfigValueType = {
   name: ConfigKeyType;
   enabled: boolean;
@@ -112,3 +115,7 @@ export const maybeRefreshRemoteConfig = throttle(
 export function isEnabled(name: ConfigKeyType): boolean {
   return get(config, [name, 'enabled'], false);
 }
+
+export function getValue(name: ConfigKeyType): string | undefined {
+  return get(config, [name, 'value'], undefined);
+}