What does an Android developer need to know?

Question

Android

Next year I start trying to go to interviews and look for a job. 3 years experience in android development. I deleted all my projects, made to order, there were no projects left. But the experience is huge and I have already written a lot. All 3 years I programmed in AIDE on the phone. Soon I sit down at the computer, in Android Studio. Not in AIDE
- Java 8
- Emulator (test on the phone itself)
- Support annotations
- Libraries Dagger, RxJava, Realm, ButterKnife, Retrofit, GSON
Do I need to learn how to use these libraries? Do I need to learn Java 8? What you need to know in my situation, if instead of Realm I use SQL, instead of Retrofit I use Fast Android Networking, I parse JSON "by hand".
I write really clean code, Clean Architecture, in general I am a perfectionist