How to cancel readyAsyncCalls ? There are many AsyncCall in readyAsyncCalls，They take up alot of memory and cause OOM

**Glide Version**: 4.11.0

**Integration libraries**: 'com.github.bumptech.glide:okhttp3-integration:4.11.0'

**Device/Android Version**: Android 9

**Issue details / Repro steps / Use case background**:
This problem appeared when running monkey test，when the network is not good, there is a large amount of memory leaks.
After analyzing the hprof file，I found that there are 40000+ AsyncCall objects and they occupy 80m+ memory。

so I want to know how to cancle these AsyncCalls when the memory is low.