Increment AVF rollback indices for 25Q2

Bumping rollback_index of Microdroid kernel is critical to the rollback
protection story of Microdroid based VM, same is true for service_vm
kernel.  In addition to these, it is neater to bump the version of each
apex on significant releases.

Test: Builds
Bug: 392895864
Change-Id: I0104e6ff646ac3d54ba10322fd1839f37f11cae1
diff --git a/guest/rialto/Android.bp b/guest/rialto/Android.bp
index 35ede7a..a49f11f 100644
--- a/guest/rialto/Android.bp
+++ b/guest/rialto/Android.bp
@@ -63,8 +63,8 @@
 
 // Both SERVICE_VM_VERSION and SERVICE_VM_VERSION_STRING should represent the
 // same version number for the service VM.
-SERVICE_VM_VERSION = 1
-SERVICE_VM_VERSION_STRING = "1"
+SERVICE_VM_VERSION = 2
+SERVICE_VM_VERSION_STRING = "2"
 
 genrule {
     name: "service_vm_version_rs",