Make testability an explicit requirement before going to alpha

This is a follow-up to our last Jetpack Working Group meeting

PiperOrigin-RevId: 571935474
Change-Id: I1d318e4f8cccc369fd52f7bcafb266b5bc8eaaea
diff --git a/docs/versioning.md b/docs/versioning.md
index ad75a92..34847dc 100644
--- a/docs/versioning.md
+++ b/docs/versioning.md
@@ -247,6 +247,8 @@
         [experimental APIs](/company/teams/androidx/api_guidelines/index.md#experimental-api)
         across same-version group boundaries
 *   Testing
+    *   Ensure the library is testable. Follow the guideline on
+        [go/androidx/testability](/company/teams/androidx/testability.md)
     *   All changes **should** be accompanied by a `Test:` stanza
     *   All pre-submit and post-submit tests are passing
     *   Flaky or failing tests **must** be suppressed or fixed within one day