[pvmfw][vmbase] Move MemoryTracker to vmbase for reuse

No behavior change in this cl.

Bug: 284462758
Test: m pvmfw_img
Change-Id: Id2970e3e8bb87d7c43903fe7e750b3c944178905
diff --git a/pvmfw/src/virtio/pci.rs b/pvmfw/src/virtio/pci.rs
index 58bc07e..ad7cfbb 100644
--- a/pvmfw/src/virtio/pci.rs
+++ b/pvmfw/src/virtio/pci.rs
@@ -15,7 +15,7 @@
 //! Functions to scan the PCI bus for VirtIO devices.
 
 use super::hal::HalImpl;
-use crate::{entry::RebootReason, memory::MemoryTracker};
+use crate::entry::RebootReason;
 use alloc::boxed::Box;
 use fdtpci::PciInfo;
 use log::{debug, error};
@@ -30,6 +30,7 @@
         DeviceType, Transport,
     },
 };
+use vmbase::memory::MemoryTracker;
 
 pub(super) static PCI_INFO: OnceBox<PciInfo> = OnceBox::new();