[attestation_ext] Check attestation extension in e2e test

Bug: 325610326
Test: atest AvfRkpdVmAttestationTestApp
Change-Id: I93d49303d09685609a7c3b975667c523a39d428c
diff --git a/service_vm/test_apk/Android.bp b/service_vm/test_apk/Android.bp
index de731f6..cd992db 100644
--- a/service_vm/test_apk/Android.bp
+++ b/service_vm/test_apk/Android.bp
@@ -57,6 +57,7 @@
     static_libs: [
         "RkpdAppTestUtil",
         "androidx.work_work-testing",
+        "bouncycastle-unbundled",
     ],
     instrumentation_for: "rkpdapp",
     // This app is a variation of rkpdapp, with additional permissions to run