Merge "Fix concurrentModificationException of DevicePostureController listeners" into main

import kotlin.Unit;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.CopyOnWriteArrayList;

import java.util.concurrent.Executor;

import javax.inject.Inject;

public class DevicePostureControllerImpl implements DevicePostureController {

    /** From androidx.window.common.COMMON_STATE_USE_BASE_STATE */

    private static final int COMMON_STATE_USE_BASE_STATE = 1000;

    private final List<Callback> mListeners = new ArrayList<>();

    /**

     * Despite this is always used only from the main thread, it might be that some listener

     * unregisters itself while we're sending the update, ending up modifying this while we're

     * iterating it.

     * Keeping a threadsafe list of listeners helps preventing ConcurrentModificationExceptions.

     */

    private final List<Callback> mListeners = new CopyOnWriteArrayList<>();

    private final List<DeviceState> mSupportedStates;

    private DeviceState mCurrentDeviceState;

    private int mCurrentDevicePosture = DEVICE_POSTURE_UNKNOWN;