pvmfw: Add support for variable config entry count am: 3300149400

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2707329

Change-Id: Id9505ef1507895190fc38bdf3d8385ddffbc1737
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>