Address possible failure mode when installing an app with mobile-install onto Android 9 devices.

RELNOTES: None.
PiperOrigin-RevId: 222863995
diff --git a/site/docs/tutorial/android-app.md b/site/docs/tutorial/android-app.md
index 339fbc7..21683e3 100644
--- a/site/docs/tutorial/android-app.md
+++ b/site/docs/tutorial/android-app.md
@@ -357,6 +357,12 @@
 bazel mobile-install //src/main:app
 ```
 
+> **Note**: `mobile-install` may not work if your device is running Android 9
+> (Pie). This issue is being tracked
+> [here](https://github.com/bazelbuild/examples/issues/77).
+> As a workaround, use `adb install bazel-bin/src/main/app.apk` to install the
+> APK on the device.
+
 Next, find and launch the "Bazel Tutorial App", which looks as follows:
 
 <img src="/assets/android_tutorial_before.png" alt="screenshot of tutorial app" width="500">