Add file io benchmark program

Bug: 195490345
Test: benchmark_example.sh aosp_oriole_pkvm-userdebug
Change-Id: Idd9f8e97b16d83120bcb54551832eacbbd0670f7
diff --git a/tests/benchmark/assets/benchmark.pem b/tests/benchmark/assets/benchmark.pem
new file mode 100644
index 0000000..2716fde
--- /dev/null
+++ b/tests/benchmark/assets/benchmark.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQCsXMc0YBu8ch0E
+ACd9xchbrAHulBYggzsQ9sEj6paC211QfRoYt2kCukAvj4uqutIBACLO44FPUfjf
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+ICNmgv4D9eRJaKdIXaCKA8FqHqQN+/a6cmDUi8qQ6QKBgQDbnrkxJAoLJ6gPBFOu
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+JDiMtq1RhZ5iu03Jme1ejM8V4aMyJzSawV6oIDrCu1X3xupBxBg5QSI58QKBgQCx
+/Ts/r1WyyTZW99NpWPTDUQuew/obZSOpA03NPiukNBAs95rNdqJkLW5PdfMlam8g
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+eoKIUFkYr6kTP/mXG9LM7yqE+ic37M4MZ2qL7DE8MSASy/aBKruueyLEUSWvjGxd
+aBW8JQ/zbcsdZKwV1as6St5kyQ==
+-----END PRIVATE KEY-----