ANDROID: KVM: arm64: Handle guest FF-A partition info get

Allow a guests to discover the secure partitions from Trustzone by
forwarding the call to the hypervisor which copies the response into the
guest buffers.

Bug: 269285339
Bug: 278749606
Change-Id: Iee3c4cefb38a990284126ce9a1d71c57a4259b3e
Signed-off-by: Sebastian Ene <sebastianene@google.com>