MicrodroidTests: Fix presubmit

Flag guarded member should only be tested when flag is on.

Bug: 383901066
Change-Id: I3878f8ace73459f1ccd37e8d5eb7174c9f980b99
Test: T/H, atest MicrodroidTests
diff --git a/tests/testapk/Android.bp b/tests/testapk/Android.bp
index 01af51c..cb374a5 100644
--- a/tests/testapk/Android.bp
+++ b/tests/testapk/Android.bp
@@ -16,9 +16,11 @@
 java_defaults {
     name: "MicrodroidTestAppsDefaults",
     static_libs: [
+        "avf_aconfig_flags_java",
         "com.android.microdroid.testservice-java",
         "com.android.microdroid.test.vmshare_service-java",
         "com.android.virt.vm_attestation.testservice-java",
+        "platform-test-annotations",
     ],
     certificate: ":MicrodroidTestAppCert",
     sdk_version: "test_current",