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/Android.bp b/Android.bp
index 22581b0..2f6fc20 100644
--- a/Android.bp
+++ b/Android.bp
@@ -54,7 +54,7 @@
             cfgs: ["llpvm_changes"],
         },
         release_avf_enable_multi_tenant_microdroid_vm: {
-            cfgs: ["payload_not_root"],
+            cfgs: ["multi_tenant"],
         },
         release_avf_enable_remote_attestation: {
             cfgs: ["remote_attestation"],
diff --git a/encryptedstore/src/main.rs b/encryptedstore/src/main.rs
index db3d4f6..dcb1cba 100644
--- a/encryptedstore/src/main.rs
+++ b/encryptedstore/src/main.rs
@@ -94,7 +94,7 @@
     }
     mount(&crypt_device, mountpoint)
         .with_context(|| format!("Unable to mount {:?}", crypt_device))?;
-    if cfg!(payload_not_root) && needs_formatting {
+    if cfg!(multi_tenant) && needs_formatting {
         set_root_dir_permissions(mountpoint)?;
     }
     Ok(())
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";
   }
 
diff --git a/javalib/src/android/system/virtualmachine/VirtualMachineManager.java b/javalib/src/android/system/virtualmachine/VirtualMachineManager.java
index e45fe99..a4927db 100644
--- a/javalib/src/android/system/virtualmachine/VirtualMachineManager.java
+++ b/javalib/src/android/system/virtualmachine/VirtualMachineManager.java
@@ -107,7 +107,7 @@
     @Retention(RetentionPolicy.SOURCE)
     @StringDef(
             prefix = "FEATURE_",
-            value = {FEATURE_DICE_CHANGES, FEATURE_PAYLOAD_NOT_ROOT, FEATURE_VENDOR_MODULES})
+            value = {FEATURE_DICE_CHANGES, FEATURE_MULTI_TENANT, FEATURE_VENDOR_MODULES})
     public @interface Features {}
 
     /**
@@ -123,8 +123,7 @@
      * @hide
      */
     @TestApi
-    public static final String FEATURE_PAYLOAD_NOT_ROOT =
-            IVirtualizationService.FEATURE_PAYLOAD_NON_ROOT;
+    public static final String FEATURE_MULTI_TENANT = IVirtualizationService.FEATURE_MULTI_TENANT;
 
     /**
      * Feature to allow vendor modules in Microdroid.
diff --git a/libs/microdroid_uids/src/lib.rs b/libs/microdroid_uids/src/lib.rs
index 04dc190..0248c61 100644
--- a/libs/microdroid_uids/src/lib.rs
+++ b/libs/microdroid_uids/src/lib.rs
@@ -29,7 +29,7 @@
 // helps avoid confusion.)
 
 /// Group ID shared by all payload users.
-pub const MICRODROID_PAYLOAD_GID: u32 = if cfg!(payload_not_root) { 6000 } else { 0 };
+pub const MICRODROID_PAYLOAD_GID: u32 = if cfg!(multi_tenant) { 6000 } else { 0 };
 
 /// User ID for the initial payload user.
-pub const MICRODROID_PAYLOAD_UID: u32 = if cfg!(payload_not_root) { 6000 } else { 0 };
+pub const MICRODROID_PAYLOAD_UID: u32 = if cfg!(multi_tenant) { 6000 } else { 0 };
diff --git a/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java b/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java
index 2500f3b..40c5cae 100644
--- a/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java
+++ b/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java
@@ -1550,7 +1550,7 @@
     @CddTest(requirements = {"9.17/C-1-1"})
     public void payloadIsNotRoot() throws Exception {
         assumeSupportedDevice();
-        assumeFeatureEnabled(VirtualMachineManager.FEATURE_PAYLOAD_NOT_ROOT);
+        assumeFeatureEnabled(VirtualMachineManager.FEATURE_MULTI_TENANT);
 
         VirtualMachineConfig config =
                 newVmConfigBuilder()
diff --git a/virtualizationmanager/src/aidl.rs b/virtualizationmanager/src/aidl.rs
index 8456888..684aa64 100644
--- a/virtualizationmanager/src/aidl.rs
+++ b/virtualizationmanager/src/aidl.rs
@@ -34,7 +34,7 @@
     IVirtualMachine::{BnVirtualMachine, IVirtualMachine},
     IVirtualMachineCallback::IVirtualMachineCallback,
     IVirtualizationService::IVirtualizationService,
-    IVirtualizationService::FEATURE_PAYLOAD_NON_ROOT,
+    IVirtualizationService::FEATURE_MULTI_TENANT,
     IVirtualizationService::FEATURE_VENDOR_MODULES,
     IVirtualizationService::FEATURE_DICE_CHANGES,
     MemoryTrimLevel::MemoryTrimLevel,
@@ -276,7 +276,7 @@
         // TODO(b/298012279): make this scalable.
         match feature {
             FEATURE_DICE_CHANGES => Ok(cfg!(dice_changes)),
-            FEATURE_PAYLOAD_NON_ROOT => Ok(cfg!(payload_not_root)),
+            FEATURE_MULTI_TENANT => Ok(cfg!(multi_tenant)),
             FEATURE_VENDOR_MODULES => Ok(cfg!(vendor_modules)),
             _ => {
                 warn!("unknown feature {feature}");
diff --git a/virtualizationservice/aidl/android/system/virtualizationservice/IVirtualizationService.aidl b/virtualizationservice/aidl/android/system/virtualizationservice/IVirtualizationService.aidl
index 9255e1c..d6a1299 100644
--- a/virtualizationservice/aidl/android/system/virtualizationservice/IVirtualizationService.aidl
+++ b/virtualizationservice/aidl/android/system/virtualizationservice/IVirtualizationService.aidl
@@ -23,7 +23,7 @@
 
 interface IVirtualizationService {
     const String FEATURE_DICE_CHANGES = "com.android.kvm.DICE_CHANGES";
-    const String FEATURE_PAYLOAD_NON_ROOT = "com.android.kvm.PAYLOAD_NON_ROOT";
+    const String FEATURE_MULTI_TENANT = "com.android.kvm.MULTI_TENANT";
     const String FEATURE_VENDOR_MODULES = "com.android.kvm.VENDOR_MODULES";
 
     /**