MM-53274 - Add a "feature flag" for Calls ringing (#23810)

* add "feature flag" for calls ringing

* tests

webapp/channels/src/selectors/calls.ts

@@ -6,6 +6,12 @@ import {suitePluginIds} from 'utils/constants';
 import semver from 'semver';
 
 export function isCallsEnabled(state: GlobalState, minVersion = '0.4.2') {
-    return state.plugins.plugins[suitePluginIds.calls] &&
-        semver.gte(state.plugins.plugins[suitePluginIds.calls].version || '0.0.0', minVersion);
+    return Boolean(state.plugins.plugins[suitePluginIds.calls] &&
+        semver.gte(state.plugins.plugins[suitePluginIds.calls].version || '0.0.0', minVersion));
+}
+
+export function isCallsRingingEnabled(state: GlobalState) {
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore
+    return Boolean(state[`plugins-${suitePluginIds.calls}`]?.callsConfig?.EnableRinging);
 }