shared process - move all settings sync related services to sandbox

//cc @sandy081

src/vs/workbench/services/userDataSync/electron-sandbox/userDataSyncMachinesService.ts

@@ -0,0 +1,50 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { ISharedProcessService } from 'vs/platform/ipc/electron-sandbox/sharedProcessService';
+import { Disposable } from 'vs/base/common/lifecycle';
+import { IChannel } from 'vs/base/parts/ipc/common/ipc';
+import { registerSingleton } from 'vs/platform/instantiation/common/extensions';
+import { IUserDataSyncMachinesService, IUserDataSyncMachine } from 'vs/platform/userDataSync/common/userDataSyncMachines';
+import { Event } from 'vs/base/common/event';
+
+class UserDataSyncMachinesService extends Disposable implements IUserDataSyncMachinesService {
+
+	declare readonly _serviceBrand: undefined;
+
+	private readonly channel: IChannel;
+
+	get onDidChange(): Event<void> { return this.channel.listen<void>('onDidChange'); }
+
+	constructor(
+		@ISharedProcessService sharedProcessService: ISharedProcessService
+	) {
+		super();
+		this.channel = sharedProcessService.getChannel('userDataSyncMachines');
+	}
+
+	getMachines(): Promise<IUserDataSyncMachine[]> {
+		return this.channel.call<IUserDataSyncMachine[]>('getMachines');
+	}
+
+	addCurrentMachine(): Promise<void> {
+		return this.channel.call('addCurrentMachine');
+	}
+
+	removeCurrentMachine(): Promise<void> {
+		return this.channel.call('removeCurrentMachine');
+	}
+
+	renameMachine(machineId: string, name: string): Promise<void> {
+		return this.channel.call('renameMachine', [machineId, name]);
+	}
+
+	setEnablement(machineId: string, enabled: boolean): Promise<void> {
+		return this.channel.call('setEnablement', [machineId, enabled]);
+	}
+
+}
+
+registerSingleton(IUserDataSyncMachinesService, UserDataSyncMachinesService);