Settings panels: avoid exceptions with rust crypto (#10962)

* Settings panels: avoid exceptions with rust crypto

If we are using rust crypto, `client.crypto` is undefined. We'll need to fix
these up better in future, but for now, just return early.

* Update tests

test/test-utils/client.ts

@@ -66,7 +66,7 @@ export class MockClientWithEventEmitter extends EventEmitter {
  * ```
  */
 export const getMockClientWithEventEmitter = (
-    mockProperties: Partial<Record<MethodLikeKeys<MatrixClient>, unknown>>,
+    mockProperties: Partial<Record<keyof MatrixClient, unknown>>,
 ): MockedObject<MatrixClient> => {
     const mock = mocked(new MockClientWithEventEmitter(mockProperties) as unknown as MatrixClient);
 
@@ -143,15 +143,15 @@ export const mockClientMethodsCrypto = (): Partial<
     Record<MethodLikeKeys<MatrixClient> & PropertyLikeKeys<MatrixClient>, unknown>
 > => ({
     isCryptoEnabled: jest.fn(),
-    isSecretStorageReady: jest.fn(),
     isCrossSigningReady: jest.fn(),
     isKeyBackupKeyStored: jest.fn(),
     getCrossSigningCacheCallbacks: jest.fn().mockReturnValue({ getCrossSigningKeyCache: jest.fn() }),
     getStoredCrossSigningForUser: jest.fn(),
     checkKeyBackup: jest.fn().mockReturnValue({}),
+    secretStorage: { hasKey: jest.fn() },
     crypto: {
+        isSecretStorageReady: jest.fn(),
         getSessionBackupPrivateKey: jest.fn(),
-        secretStorage: { hasKey: jest.fn() },
         crossSigningInfo: {
             getId: jest.fn(),
             isStoredInSecretStorage: jest.fn(),