Add imgdiag ART APEX

Bug: 333649424
Test: presubmit
Change-Id: I9e19b00d7cfb54cf36097f8a73457ea2d4889113
diff --git a/apex/apex.go b/apex/apex.go
index 1dec61b..abafcd5 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -1182,6 +1182,7 @@
 		"test_com.android.os.statsd",
 		"test_com.android.permission",
 		"test_com.android.wifi",
+		"test_imgdiag_com.android.art",
 		"test_jitzygote_com.android.art",
 		// go/keep-sorted end
 	}