aconfig: add storage flag read api integration tests to test mapping

Bug: b/321077378
Test: atest aconfig_storage.test.rust; atest aconfig_storage.test.cpp
Change-Id: I6920b45e4f968efedcdd6afb8c68314baa02327f
diff --git a/tools/aconfig/TEST_MAPPING b/tools/aconfig/TEST_MAPPING
index 398da06..1a3f79a 100644
--- a/tools/aconfig/TEST_MAPPING
+++ b/tools/aconfig/TEST_MAPPING
@@ -65,5 +65,15 @@
       // that using the flag macros to do filtering will get affected.
       "name": "FlagMacrosTests"
     }
+  ],
+  "postsubmit": [
+    {
+      // aconfig_storage read api rust integration tests
+      "name": "aconfig_storage.test.rust"
+    },
+    {
+      // aconfig_storage read api cpp integration tests
+      "name": "aconfig_storage.test.cpp"
+    }
   ]
 }