Add `Access` implementation in about screen

[takahirom]

Kind (Required)

• Proposal / Discussion

  Overview (Required)

• I'm thinking about launching Google Map with an implicit intent.

• https://github.com/DroidKaigi/conference-app-2020/blob/7f29bcb303e6056a933b9d687b21c9804640f647/feature/about/src/main/java/io/github/droidkaigi/confsched2020/about/ui/AboutFragment.kt#L89

  Links

[youmitsu]

🙋‍♂️

[roana0229]

Assigned 👍