We're observing the following error on Android API 27 and under: ``` Caused by: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "pthread_mutexattr_setprotocol" referenced by "/data/app/me.lyft.android.dev-2/lib/arm64/libenvoy_jni.so" ``` It seems that `pthread_mutexattr_setprotocol` was added in API 28: https://android.googlesource.com/platform/bionic/+/master/docs/status.md