Add Retrofit networking lesson#115

MihaiCristianCondrea merged 1 commit intomainMihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition:mainfrom

codex/implement-retrofit-activities-and-resourcesMihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition:codex/implement-retrofit-activities-and-resourcesCopy head branch name to clipboard