AppArmor Support

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**Is your feature request related to a problem? Please describe.**
I cannot launch applications which rely heavily on AppArmor (particularly snaps). Attempts to start AppArmor fail as follows (e.g. on Ubuntu 22.04):
```
# aa-status
apparmor module is not loaded.
# systemctl status snapd.apparmor.service
● snapd.apparmor.service - Load AppArmor profiles managed internally by snapd
Loaded: loaded (/lib/systemd/system/snapd.apparmor.service; enabled; vendor preset: enabled)
Active: inactive (dead)
Condition: start condition failed at Tue 2022-08-09 14:56:30 CDT; 49s ago
└─ ConditionSecurity=apparmor was not met
```

**Describe the solution you'd like**
Now that [this MR](https://gitlab.com/apparmor/apparmor/-/commit/72c06c4d35e7f9dac3510038974f09f841ca7cad) has been merged into AppArmor, it should have native support for running in WSL. What needs to be done on the WSL side to enable AppArmor?

**Describe alternatives you've considered**
The only alternative is to use apps that do not rely on AppArmor which is not ideal.

**Additional context**
Is there an ETA for when AppArmor will be supported in WSL2 or a workaround until it will be ready? Thanks!

Start by reviewing the linked AppArmor commit and the WSL-side integration needed for AppArmor on Ubuntu 22.04. Reproduce the reported aa-status and snapd.apparmor.service failures, then define done as AppArmor loading in WSL2 and the snapd AppArmor service starting successfully.

Written by the indexing model from the issue text.