Move runtime IP to EditorPref / DevAuthToken to PlayerPref

[paulbalaji]

Description

• move runtime ip to an editor pref
• move DAT to player pref
  • this ties a DAT to a company/project_name
  • only create DAT.txt if enabled in GdkToolsConfiguration
  • pass in DAT as argument when starting android client for cloud
  • if DAT argument passed in, player pref is set
  • if no DAT argument exists / previously set as player pref - read from DAT.txt and save to player prefs

Tests

• local launch works fine
• android cloud launch via editor works fine
• no DAT.txt generated unless specifically requested

Documentation

• changelog
• update screenshots/docs where relevant

Primary reviewers

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[jessicafalk]

some smaller nits, but overall lgtm.
I assume you have tested that on an emulator and a phone

[zeroZshadow]

Is the log needed?

[paulbalaji]

given there's a couple ways of saving out a token (player prefs / .txt), I'd prefer to log where it's being saved

this way we'll be able to see if a user's actually created DAT.txt before complaining it doesn't exist