Enable bootstrap tests on art 7 and 9

Bug: b/337801526
Change-Id: Ie8ef36efb05ae96407f0bae3f3750b8c40de8d36
diff --git a/d8_r8/test/build.gradle.kts b/d8_r8/test/build.gradle.kts
index 7eaa082..b5ee44a 100644
--- a/d8_r8/test/build.gradle.kts
+++ b/d8_r8/test/build.gradle.kts
@@ -58,7 +58,8 @@
 
   // TODO(b/337801526): Enable for all runtimes
   fun runBootstrapTests() : Boolean {
-    val enabled = listOf("dex-default", "dex-8.1.0", "dex-13.0.0", "dex-12.0.0", "dex-10.0.0")
+    val enabled = listOf("dex-default", "dex-8.1.0", "dex-13.0.0", "dex-12.0.0",
+                         "dex-10.0.0", "dex-9.0.0", "dex-7.0.0")
     if (project.hasProperty("runtimes")) {
       for (doRun : String in enabled) {
         if (project.property("runtimes").toString().contains(doRun)) {