[Subs] Custom app icons (#6758)

* custom icons

* rm default

* clouds.jpg

* use cross-platform fork

* minor fixes for android

* update dynamic icon lib

* gate app icon settings behind discover debug dids

* rename clouds

* Bop it

* Update default ios icon as well

* Remove old icon

* Update logo placement

* update to latest expo-dynamic-app-icon

* fix android icon sizes

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Co-authored-by: Eric Bailey <git@esb.lol>

package.json

@@ -74,6 +74,7 @@
     "@lingui/react": "^4.5.0",
     "@mattermost/react-native-paste-input": "^0.7.1",
     "@miblanchard/react-native-slider": "^2.3.1",
+    "@mozzius/expo-dynamic-app-icon": "^1.4.1",
     "@radix-ui/react-dismissable-layer": "^1.1.1",
     "@radix-ui/react-dropdown-menu": "2.0.1",
     "@radix-ui/react-focus-guards": "^1.1.1",