Store files in a VM in Android 14 using AVF for maximum security

I propose to leverage the Android Virtualization Framework (AVF), [available in Android 14](https://android-developers.googleblog.com/2023/12/virtual-machines-as-core-android-primitive.html) and enable the **storage of files within a secure virtual machine** (VM) environment.

To summarize the benefits of [AVF](https://source.android.com/docs/core/virtualization):
- The workload and data inside the VM is inaccessible (confidential) from the host (Android).
- Even if Android is compromised all the way up to (and including) the host kernel, the isolated VM remains uncompromised.