Add HMAC key sharing tests

Bug: 70409878
Test: VtsHalKeymasterV4_0TargetTest
Change-Id: I9da12a70ce04f606980b5c8bec8deaeaa318bf81
diff --git a/keymaster/4.0/vts/functional/KeymasterHidlTest.h b/keymaster/4.0/vts/functional/KeymasterHidlTest.h
index a490341..0c73f05 100644
--- a/keymaster/4.0/vts/functional/KeymasterHidlTest.h
+++ b/keymaster/4.0/vts/functional/KeymasterHidlTest.h
@@ -101,6 +101,7 @@
     }
 
     static IKeymasterDevice& keymaster() { return *keymaster_; }
+    static const std::vector<sp<IKeymasterDevice>>& all_keymasters() { return all_keymasters_; }
     static uint32_t os_version() { return os_version_; }
     static uint32_t os_patch_level() { return os_patch_level_; }