Clean up and update ClientController TODOs

import java.util.function.Consumer;

/**

 * Store and manage {@link InputMethodManagerService} clients. This class was designed to be a

 * singleton in {@link InputMethodManagerService} since it stores information about all clients,

 * still the current client will be defined per display.

 *

 * <p>

 * As part of the re-architecture plan (described in go/imms-rearchitecture-plan), the following

 * fields and methods will be moved out from IMMS and placed here:

 * <ul>

 * <li>mClients (ArrayMap of ClientState indexed by IBinder)</li>

 * </ul>

 * <p>

 * Nested Classes (to move from IMMS):

 * <ul>

 * <li>ClientDeathRecipient</li>

 * <li>ClientState<</li>

 * </ul>

 * <p>

 * Methods to rewrite and/or extract from IMMS and move here:

 * <ul>

 * <li>addClient</li>

 * <li>removeClient</li>

 * <li>verifyClientAndPackageMatch</li>

 * <li>setImeTraceEnabledForAllClients (make it reactive)</li>

 * </ul>

 * Store and manage {@link InputMethodManagerService} clients.

 */

// TODO(b/314150112): Update the Javadoc above, by removing the re-architecture steps, once this

//  class is finalized

final class ClientController {

    // TODO(b/314150112): Make this field private when breaking the cycle with IMMS.

    @GuardedBy("ImfLock.class")

    private final ArrayMap<IBinder, ClientState> mClients = new ArrayMap<>();

        }

    }

    // TODO(b/314150112): Move this method to InputMethodBindingController

    // TODO(b/325515685): Move this method to InputMethodBindingController

    /**

     * Hide the IME if the removed user is the current user.

     */