accountmanager 调用说明

增加账户代码说明，

public AccountManagerFuture<Bundle> addAccount(final String accountType,
        final String authTokenType, final String[] requiredFeatures,
        final Bundle addAccountOptions,
        final Activity activity, AccountManagerCallback<Bundle> callback, Handler handler) 
会调用Response这个函数进行执行，进行创建service，这个service自动调用打开activiy对话框。

return new AmsTask(activity, handler, callback) {
    @Override
    public void doWork() throws RemoteException {
        mService.addAccount(mResponse, accountType, authTokenType,
                requiredFeatures, activity != null, optionsIn);
    }
}.start();


调用accountManager的AddAccount-》AccountManagerService的addAccount-》打开service

Response对象在accountManager中创建的，在accountManagerServie中进行二次继承