Replace MatrixClient.isRoomEncrypted by MatrixClient.CryptoApi.isEncryptionEnabledInRoom in Searching.ts

src/Searching.ts

@@ -605,7 +605,7 @@ function eventIndexSearch(
     let searchPromise: Promise<ISearchResults>;
 
     if (roomId !== undefined) {
-        if (client.isRoomEncrypted(roomId)) {
+        if (client.getCrypto()?.isEncryptionEnabledInRoom(roomId)) {
             // The search is for a single encrypted room, use our local
             // search method.
             searchPromise = localSearchProcess(client, term, roomId);