UnitTest androidTestコードを追加

[LeoAndo]

issues (任意)

close #18

修正内容 (必須)

UnitTest androidTestコードを追加

capture (任意)

なし

refs (任意)

https://github.com/android/nowinandroid/blob/7dec90ba30a5a0512b4b72bbf5b34a7bbe3c15de/feature/foryou/src/test/java/com/google/samples/apps/nowinandroid/feature/foryou/ForYouViewModelTest.kt https://github.com/android/nowinandroid/tree/7dec90ba30a5a0512b4b72bbf5b34a7bbe3c15de/core/testing/src/main/java/com/google/samples/apps/nowinandroid/core/testing/util https://github.com/android/nowinandroid/blob/7dec90ba30a5a0512b4b72bbf5b34a7bbe3c15de/core/testing/src/main/java/com/google/samples/apps/nowinandroid/core/testing/util/MainDispatcherRule.kt https://github.com/android/nowinandroid/tree/main/app/src/androidTest/java/com/google/samples/apps/nowinandroid/ui