Enforce adb unroot for testCustomVirtualMachinePermission

Bug: 266998686
Test: Presubmit
Change-Id: I1c1bc12acad7798bd8682086cb0ca7a204c731b2
diff --git a/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java b/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
index 0be6a62..1fa0afe 100644
--- a/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
+++ b/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
@@ -827,6 +827,7 @@
         assumeTrue(
                 "Protected VMs are not supported",
                 getAndroidDevice().supportsMicrodroid(/*protectedVm=*/ true));
+        assumeTrue("Test requires adb unroot", getDevice().disableAdbRoot());
         CommandRunner android = new CommandRunner(getDevice());
 
         // Pull etc/microdroid.json