Merge "Prune unnecessary symbols from read API" into main am: 966e558e9f

Original change: https://android-review.googlesource.com/c/platform/build/+/3062122

Change-Id: I0c62ea21cc0b5b0875e12c925630e73f8db745bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

tools/aconfig/aconfig_storage_read_api/Android.bp

@@ -103,4 +103,7 @@ cc_library {
     ],
     min_sdk_version: "29",
     double_loadable: true,
+    cflags: [
+        "-fvisibility=hidden",
+    ],
 }