Merge "Allow root uid to listen for uid state changes across users." into main

import android.os.Handler;

import android.os.IBinder;

import android.os.Message;

import android.os.Process;

import android.os.RemoteCallbackList;

import android.os.RemoteException;

import android.os.SystemClock;

                + UUID.randomUUID().toString());

        synchronized (mLock) {

            final boolean canInteractAcrossUsers = ActivityManager.checkComponentPermission(

                    INTERACT_ACROSS_USERS_FULL, callingUid, Process.INVALID_UID, true)

                            == PackageManager.PERMISSION_GRANTED;

            mUidObservers.register(observer, new UidObserverRegistration(callingUid,

                    callingPackage, which, cutpoint,

                    ActivityManager.checkUidPermission(INTERACT_ACROSS_USERS_FULL, callingUid)

                    == PackageManager.PERMISSION_GRANTED, uids, token));

                    canInteractAcrossUsers, uids, token));

        }

        return token;