Conform more of the codebase to strictNullChecks (#10672)

* Conform more of the codebase to `strictNullChecks`

* Iterate

* Iterate

* Iterate

* Iterate

* Conform more of the codebase to `strictNullChecks`

* Iterate

* Update record key

src/stores/widgets/StopGapWidgetDriver.ts

@@ -274,19 +274,22 @@ export class StopGapWidgetDriver extends WidgetDriver {
             await Promise.all(
                 Object.entries(contentMap).flatMap(([userId, userContentMap]) =>
                     Object.entries(userContentMap).map(async ([deviceId, content]): Promise<void> => {
+                        const devices = deviceInfoMap.get(userId);
+                        if (!devices) return;
+
                         if (deviceId === "*") {
                             // Send the message to all devices we have keys for
                             await client.encryptAndSendToDevices(
-                                Array.from(deviceInfoMap.get(userId).values()).map((deviceInfo) => ({
+                                Array.from(devices.values()).map((deviceInfo) => ({
                                     userId,
                                     deviceInfo,
                                 })),
                                 content,
                             );
-                        } else {
+                        } else if (devices.has(deviceId)) {
                             // Send the message to a specific device
                             await client.encryptAndSendToDevices(
-                                [{ userId, deviceInfo: deviceInfoMap.get(userId).get(deviceId) }],
+                                [{ userId, deviceInfo: devices.get(deviceId)! }],
                                 content,
                             );
                         }

src/stores/widgets/WidgetLayoutStore.ts

@@ -363,7 +363,7 @@ export class WidgetLayoutStore extends ReadyWatchingStore {
     }
 
     public getContainerWidgets(room: Optional<Room>, container: Container): IApp[] {
-        return this.byRoom.get(room?.roomId)?.get(container)?.ordered || [];
+        return (room && this.byRoom.get(room.roomId)?.get(container)?.ordered) || [];
     }
 
     public isInContainer(room: Room, widget: IApp, container: Container): boolean {

src/stores/widgets/WidgetPermissionStore.ts

@@ -58,7 +58,7 @@ export class WidgetPermissionStore {
         return OIDCState.Unknown;
     }
 
-    public setOIDCState(widget: Widget, kind: WidgetKind, roomId: string, newState: OIDCState): void {
+    public setOIDCState(widget: Widget, kind: WidgetKind, roomId: string | undefined, newState: OIDCState): void {
         const settingsKey = this.packSettingKey(widget, kind, roomId);
 
         let currentValues = SettingsStore.getValue<{