cryptoApi.isEncryptionEnabledInRoom is slow in decryption-failure-messages.spec.ts > decryption failure messages

[florianduros]

When working on element-hq/element-web#28278 to migrate to use cryptoApi.isEncryptionEnabledInRoom, the test decryption-failure-messages.spec.ts > decryption failure messages was in failure when https://github.com/element-hq/element-web/blob/de820e11fc2bc20eb608055205e1e44d11f2c740/playwright/e2e/crypto/decryption-failure-messages.spec.ts#L70-L72 is tested.

It's failing because the room is taking too much time to be displayed because cryptoApi. isEncryptionEnabledInRoom is taking up to 4sec to respond in this case.

this.olmMachine.getRoomSettings(new RustSdkCryptoJs.RoomId(roomId)); call is causing this slowness:

matrix-js-sdk/src/rust-crypto/rust-crypto.ts

Lines 383 to 391 in 69647a3

	/**
	* Implementation of {@link CryptoApi#isEncryptionEnabledInRoom}.
	*/
	public async isEncryptionEnabledInRoom(roomId: string): Promise<boolean> {
	const roomSettings: RustSdkCryptoJs.RoomSettings | undefined = await this.olmMachine.getRoomSettings(
	new RustSdkCryptoJs.RoomId(roomId),
	);
	return Boolean(roomSettings?.algorithm);
	}