Add root property and set ktlint_code_style with android_studio

Change-Id: I62af44804812e55876cbec4e49898a22ebc376a6

.editorconfig

@@ -1,7 +1,9 @@
 # https://editorconfig.org/
 # This configuration is used by ktlint when spotless invokes it
+root = true
 
 [*.{kt,kts}]
 ij_kotlin_allow_trailing_comma=true
 ij_kotlin_allow_trailing_comma_on_call_site=true
+ktlint_code_style = android_studio
 ktlint_function_naming_ignore_when_annotated_with=Composable, Test