Explicitly include libhardware_header for vendors

Summary: This seems to  be not implicit when building vendor, so it's now necessary to explicitly include.

Test: Succesful build on master

Change-Id: Ie9720a3ae4c9f94210bc34c60d14756c7d0cf56f
Signed-off-by: Abdelrahman Daim <adaim@meta.com>

security/keymint/support/Android.bp

@@ -40,6 +40,9 @@ cc_library {
     export_include_dirs: [
         "include",
     ],
+    header_libs: [
+        "libhardware_headers",
+    ],
     defaults: [
         "keymint_use_latest_hal_aidl_ndk_shared",
     ],