Merge "Make CameraDeviceImpl#close() idempotent (for real)." into mnc-dev

import java.util.Arrays;

import java.util.Collection;

import java.util.Collections;

import java.util.concurrent.atomic.AtomicBoolean;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

    private volatile StateCallbackKK mSessionStateCallback;

    private final Handler mDeviceHandler;

    private volatile boolean mClosing = false;

    private final AtomicBoolean mClosing = new AtomicBoolean();

    private boolean mInError = false;

    private boolean mIdle = true;

    @Override

    public void close() {

        synchronized (mInterfaceLock) {

            if (mClosing.getAndSet(true)) {

                return;

            }

            try {

                if (mRemoteDevice != null) {

                    mRemoteDevice.disconnect();

    /** Whether the camera device has started to close (may not yet have finished) */

    private boolean isClosed() {

        return mClosing;

        return mClosing.get();

    }

    private CameraCharacteristics getCharacteristics() {