Code cleanups (#3264)

* Kotlin 1.8.10

https://github.com/JetBrains/kotlin/releases/tag/v1.8.10

* Migrate onActivityCreated to onViewCreated

* More final modifiers

* Java Cleanups

* Kotlin cleanups

* More final modifiers

* Const value TOOLBAR_HIDE_DELAY_MS

* Revert

app/src/main/java/com/keylesspalace/tusky/components/account/AccountActivity.kt

@@ -941,13 +941,13 @@ class AccountActivity : BottomSheetActivity(), ActionButtonActivity, HasAndroidI
     }
 
     private fun getFullUsername(account: Account): String {
-        if (account.isRemote()) {
-            return "@" + account.username
+        return if (account.isRemote()) {
+            "@" + account.username
         } else {
             val localUsername = account.localUsername
             // Note: !! here will crash if this pane is ever shown to a logged-out user. With AccountActivity this is believed to be impossible.
             val domain = accountManager.activeAccount!!.domain
-            return "@$localUsername@$domain"
+            "@$localUsername@$domain"
         }
     }