surfaceflinger:Fix potential crash issue when do AIDL FUZZ

test

There will be trigger exception when we provide invalid
inputs parameter for surfaceflinger  JNI interface

Test: 1.Run adb shell and open AIDLer tools;
      2.change to Dir /sdcard/elong.AIDLer
      3.run commond service list > service_list.txt
      4.Rerun AIDL FUZZ test

Change-Id: I0a63adc1e8ae5d9c9e43cb6df6aa13503c40a0c5