Broken link to mobile application tutorial in Java build tutorial
### Description of the problem / feature request:

On the page https://docs.bazel.build/versions/master/tutorial/java.html, the link at the bottom of the page titled `mobile application tutorial` points to the URL https://docs.bazel.build/versions/master/tutorial/app.html but this page does not exist, so a 404 is displayed instead.
site/docs/tutorial/java.md
site/docs/tutorial/java.md
diff --git a/site/docs/tutorial/java.md b/site/docs/tutorial/java.md
index 4fbaefdbe7d19e..8352229a6b4adb 100644
--- a/site/docs/tutorial/java.md
+++ b/site/docs/tutorial/java.md
@@ -412,7 +412,8 @@ dependencies.
 *  The [C++ build tutorial](../tutorial/cpp.md) to get started with building
    C++ projects with Bazel.
 
-*  The [mobile application tutorial](../tutorial/app.md) to get started with
+*  The [Android application tutorial](../tutorial/android-app.md) and
+   [iOS application tutorial](../tutorial/ios-app.md) to get started with
    building mobile applications for Android and iOS with Bazel.
 
 Happy building!
