Ensure camera service is notified of user profile changes.

package com.android.server.camera;

import android.app.ActivityManager;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.content.pm.UserInfo;

import android.hardware.ICameraService;

import android.hardware.ICameraServiceProxy;

    private final Object mLock = new Object();

    private Set<Integer> mEnabledCameraUsers;

    private int mLastUser;

    private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            final String action = intent.getAction();

            if (action == null) return;

            switch (action) {

                case Intent.ACTION_USER_ADDED:

                case Intent.ACTION_USER_REMOVED:

                case Intent.ACTION_USER_INFO_CHANGED:

                case Intent.ACTION_MANAGED_PROFILE_ADDED:

                case Intent.ACTION_MANAGED_PROFILE_REMOVED:

                    synchronized(mLock) {

                        // Return immediately if we haven't seen any users start yet

                        if (mEnabledCameraUsers == null) return;

                        switchUserLocked(mLastUser);

                    }

                    break;

                default:

                    break; // do nothing

            }

        }

    };

    private final ICameraServiceProxy.Stub mCameraServiceProxy = new ICameraServiceProxy.Stub() {

        @Override

            // Should never see this unless someone messes up the SystemServer service boot order.

            throw new IllegalStateException("UserManagerService must start before CameraService!");

        }

        IntentFilter filter = new IntentFilter();

        filter.addAction(Intent.ACTION_USER_ADDED);

        filter.addAction(Intent.ACTION_USER_REMOVED);

        filter.addAction(Intent.ACTION_USER_INFO_CHANGED);

        filter.addAction(Intent.ACTION_MANAGED_PROFILE_ADDED);

        filter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED);

        mContext.registerReceiver(mIntentReceiver, filter);

        publishBinderService(CAMERA_SERVICE_PROXY_BINDER_NAME, mCameraServiceProxy);

    }

    private void switchUserLocked(int userHandle) {

        Set<Integer> currentUserHandles = getEnabledUserHandles(userHandle);

        mLastUser = userHandle;

        if (mEnabledCameraUsers == null || !mEnabledCameraUsers.equals(currentUserHandles)) {

            // Some user handles have been added or removed, update mediaserver.

            mEnabledCameraUsers = currentUserHandles;