ANDROID: KVM: arm64: Allow RO memslot/dirty logging for non-protected guests

We now have everything we need to allow the usage of RO memslots, or
dirty logging, for non-protected guests, so let's allow the usage of
these features from userspace.

Bug: 227300338
Bug: 278749606
Change-Id: I998744c16657ed724abd8092194890b27dc3ca67
Signed-off-by: Quentin Perret <qperret@google.com>