fix bug

[jambestwick]

由于循环录屏中，调用cleanup退出，mMediacodec释放资源，但本轮循未执行完成，对象状态异常导致的bug 2021-10-12 11:38:53 717 d com.yys.monitor.ScreenCapture ,record, release() 2021-10-12 11:38:53 724 e com.yys.utils.CrashHandler =========java.lang.IllegalStateException at android.media.MediaCodec.native_dequeueOutputBuffer(Native Method) at android.media.MediaCodec.dequeueOutputBuffer(MediaCodec.java:2698) at com.yys.monitor.ScreenCapture.recordVirtualDisplay(ScreenCapture.java:385) at com.yys.monitor.ScreenCapture.lambda$startRecord$0(ScreenCapture.java:360) at com.yys.monitor.-$$Lambda$ScreenCapture$dgqDW8lr2mITEYv3l84i7RtgBOI.run(Unknown Source:2) at java.lang.Thread.run(Thread.java:764)