Visual changes to let the user easily know what release channel they are using
Visual changes to let the user easily know what release channel they are using

Summary:
1. Added a text label similar to the launch screen that tells user the release channel they are using.
2. Show a different coloured logo when the user is using the "Insiders" channel.

I have tried to keep the style as similar to the launch screen as possible for consistency.

Reviewed By: passy

Differential Revision: D32169268

fbshipit-source-id: f119a379fce983d9df765ede94148a4deaa31c9c

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