chore: Universal Linking for Android (#2324)

* android assetlinks.json config

* try renaming html to json

* update env example

* chore: fix styling

* chore: styling part 2

* test: add spec for android assetlinks

* minor fixes

* minor fixes

* remove android sha256 value from env example

* add default sh256 value

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/controllers/android_app_controller.rb

@@ -0,0 +1,5 @@
+class AndroidAppController < ApplicationController
+  def assetlinks
+    render layout: false
+  end
+end