Merge "prevent multiple include attestation header file" am: f31660f43c am: 177b852d77 am: bb62d99360

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2247936

Change-Id: I826b215e6afd165631faa191cf6ec3071332bcd0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/include/attestation/HmacKeyManager.h b/include/attestation/HmacKeyManager.h
index 571a361..d725be1 100644
--- a/include/attestation/HmacKeyManager.h
+++ b/include/attestation/HmacKeyManager.h
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+#ifndef ATTESTATION_HMACKEYMANAGER_H
+#define ATTESTATION_HMACKEYMANAGER_H
+
 #include <array>
 
 namespace android {
@@ -29,4 +32,6 @@
 private:
     const std::array<uint8_t, 128> mHmacKey;
 };
-} // namespace android
\ No newline at end of file
+} // namespace android
+
+#endif // ATTESTATION_HMACKEYMANAGER_H
\ No newline at end of file