Revert ktlint update, unrevert Gradle and PR build workflow reverts (#3681)

app/src/main/java/eu/kanade/tachiyomi/util/lang/RetryWithDelay.kt

@@ -1,10 +1,10 @@
 package eu.kanade.tachiyomi.util.lang
 
+import java.util.concurrent.TimeUnit.MILLISECONDS
 import rx.Observable
 import rx.Scheduler
 import rx.functions.Func1
 import rx.schedulers.Schedulers
-import java.util.concurrent.TimeUnit.MILLISECONDS
 
 class RetryWithDelay(
     private val maxRetries: Int = 1,

app/src/main/java/eu/kanade/tachiyomi/util/lang/StringExtensions.kt

@@ -1,7 +1,7 @@
 package eu.kanade.tachiyomi.util.lang
 
-import net.greypanther.natsort.CaseInsensitiveSimpleNaturalComparator
 import kotlin.math.floor
+import net.greypanther.natsort.CaseInsensitiveSimpleNaturalComparator
 
 /**
  * Replaces the given string to have at most [count] characters using [replacement] at its end.