Fix various type definitions

src/settings/handlers/DefaultSettingsHandler.ts

@@ -27,7 +27,7 @@ export default class DefaultSettingsHandler extends SettingsHandler {
      * @param {object} defaults The default setting values, keyed by setting name.
      * @param {object} invertedDefaults The default inverted setting values, keyed by setting name.
      */
-    constructor(private defaults: any, private invertedDefaults: any) { // TODO: [TS] Appropriate types
+    constructor(private defaults: Record<string, any>, private invertedDefaults: Record<string, any>) {
         super();
     }
 

src/settings/handlers/LocalEchoWrapper.ts

@@ -60,7 +60,7 @@ export default class LocalEchoWrapper extends SettingsHandler {
         });
     }
 
-    public canSetValue(settingName, roomId): boolean {
+    public canSetValue(settingName: string, roomId: string): boolean {
         return this.handler.canSetValue(settingName, roomId);
     }