Doesn't work in Termux on Android

### Description / Step to reproduce

Not sure if it's supposed to work. But why not?

```
~ $ runsc
panic: couldn't open /proc/sys/vm/mmap_min_addr: open /proc/sys/vm/mmap_min_addr: permission denied

goroutine 1 [running]:
gvisor.dev/gvisor/pkg/sentry/platform.init.0()
pkg/sentry/platform/mmap_min_addr.go:52 +0x158
```

### runsc version

```shell
https://storage.googleapis.com/gvisor/releases/release/latest/aarch64/ (from 24.01.2026)

~ $ curl 'https://storage.googleapis.com/gvisor/releases/release/latest/aarch64/runsc.sha512'
3b7925d26d71fdcb8cb552950c88bcfed658c06ad6b1211906bfe86d13bc56d8005ac90a4d9ab4c8b6a48eb62ec51ebcdfd45a64067ac5190274e710961e51ea runsc
```

### uname

Linux localhost 4.14.186-perf-gf8d872e9279c #1 SMP PREEMPT Tue Sep 19 12:46:50 UTC 2023 aarch64 Android