Multi_tenant is the new payload_not_root

Trying to have more fine-grained Rust configs than feature flags was
actually a terrible idea, and means extra work if I need to add
something that is multi-tenant related but not root related.

Use consistent naming throughout instead.

Bug: 302677468
Test: Builds
Change-Id: I2dfe97e8c62f24590522df89d9b373774a43d495
diff --git a/javalib/api/test-current.txt b/javalib/api/test-current.txt
index 7c61712..12c099d 100644
--- a/javalib/api/test-current.txt
+++ b/javalib/api/test-current.txt
@@ -20,7 +20,7 @@
   public class VirtualMachineManager {
     method @RequiresPermission(android.system.virtualmachine.VirtualMachine.MANAGE_VIRTUAL_MACHINE_PERMISSION) public boolean isFeatureEnabled(String) throws android.system.virtualmachine.VirtualMachineException;
     field public static final String FEATURE_DICE_CHANGES = "com.android.kvm.DICE_CHANGES";
-    field public static final String FEATURE_PAYLOAD_NOT_ROOT = "com.android.kvm.PAYLOAD_NON_ROOT";
+    field public static final String FEATURE_MULTI_TENANT = "com.android.kvm.MULTI_TENANT";
     field public static final String FEATURE_VENDOR_MODULES = "com.android.kvm.VENDOR_MODULES";
   }