Implement the Profile Setup - channels

Based on the user's selected hashtags, provide a list of channels from the top feeds api.

New mocks: https://projects.invisionapp.com/share/KWU1X9IEB2U#/screens/399136672

• Do not display NSFW channels
• Implement the new design
• Provide a list of channels to select based on the top feeds
• Plus icon should remove the channel from an internal array
• Check icon should add the channel to an internal array
• Skip should take them to the new select channels screen without saving the channels
• Continue should take them to the new select channels page and subscribe the user to the channels
• unit tests
• e2e tests