Keystore 2.0: Update service name to canonical name.

Bug: 179907868
Test: N/A
Change-Id: Ia536a92d212f42af32ed485e19c82b84b0905dc8
diff --git a/ondevice-signing/KeystoreKey.cpp b/ondevice-signing/KeystoreKey.cpp
index de7033f..840b683 100644
--- a/ondevice-signing/KeystoreKey.cpp
+++ b/ondevice-signing/KeystoreKey.cpp
@@ -129,7 +129,7 @@
     if (sm == nullptr) {
         return false;
     }
-    auto service = sm->getService(String16("android.system.keystore2"));
+    auto service = sm->getService(String16("android.system.keystore2.IKeystoreService/default"));
     if (service == nullptr) {
         return false;
     }