Support cgroup on Android

[tomaszduda23]

Description

There is effort to support docker on Android moby/moby#41111. Android mounts cpuset with noprefix. It would be great to add fallback for such cases. tomaszduda23@a362eb6

Steps to reproduce the issue

Describe the results you received and expected

Use cpus and mems if cpuset.cpus and cpuset.mems are not present.

What version of runc are you using?

runc version 1.1.14

Host OS information

No response

Host kernel information

No response

[rata]

Now that the PR is merged, can we close the issue? Or is there anything else to tackle?

[tomaszduda23]

I was going to verify when 1.3.0 is released. I can close it though. Thanks.
Merged by #4513