Show all speakers of the session

[kikuchy]

Overview (Required)

• On SessionDetailViewController, only first speaker is shown.
• Some session has two or more speakers. We want to know all of them.
• We need fix to show all speakers of the session like the Official app.

Links

• https://github.com/DroidKaigi/conference-app-2018/blob/master/app/src/main/java/io/github/droidkaigi/confsched2018/presentation/common/view/SpeakersSummaryLayout.kt

Screenshot