Merge "Ignore auto-fill requests from system."

import android.os.IBinder;

import android.os.Looper;

import android.os.Message;

import android.os.Process;

import android.os.RemoteException;

import android.os.ResultReceiver;

import android.os.ShellCallback;

            final IBinder activityToken = LocalServices.getService(ActivityManagerInternal.class)

                        .getTopVisibleActivity(uid);

            if (activityToken == null) {

                // TODO(b/33197203, b/34819567, b/34171325): figure out proper way to handle it

                if (uid == Process.SYSTEM_UID) {

                    if (DEBUG) Log.w(TAG, "requestAutoFill(): ignoring call from system");

                    return;

                }

                throw new SecurityException("uid " + uid + " does not own the top activity");

            }