identity: fix access control checks in libeic.

Also add a new libeic_test binary which has a regression test for this
vulnerability.

Bug: 190757775
Test: atest libeic_test
Test: atest VtsHalIdentityTargetTest
Test: atest CtsIdentityTestCases
Change-Id: I8344655c59930d6bf1baa4e0f8d0f60e4fc9e48d
diff --git a/identity/TEST_MAPPING b/identity/TEST_MAPPING
index f35f4b7..85cf91f 100644
--- a/identity/TEST_MAPPING
+++ b/identity/TEST_MAPPING
@@ -8,6 +8,9 @@
     },
     {
       "name": "android.hardware.identity-support-lib-test"
+    },
+    {
+      "name": "libeic_test"
     }
   ]
 }