Build tutorial app as part of sample build (#1677)

Summary:
Per title.

Will require https://github.com/facebook/flipper/issues/1676 to land first.

Pull Request resolved: https://github.com/facebook/flipper/pull/1677

Reviewed By: mweststrate

Differential Revision: D24981568

Pulled By: passy

fbshipit-source-id: 053f4bafaffbae0890603aef5b3a01c7d0e1137e

.github/workflows/android-sample.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Install NDK 20
       run: echo "y" | sudo /usr/local/lib/android/sdk/tools/bin/sdkmanager --install "ndk;20.0.5594570" --sdk_root=${ANDROID_SDK_ROOT}
     - name: Build with Gradle
-      run: ./gradlew :sample:assembleDebug
+      run: ./gradlew :sample:assembleDebug :tutorial:assembleDebug
     - name: upload artifact
       uses: actions/upload-artifact@v1
       with: