Fix SAT warnings (#14202)

* Fix SAT warnings

- checkstyle.ModifierOrderCheck
- checkstyle.OneStatementPerLineCheck
- checkstyle.NeedBracesCheck
- PMD.UseStandardCharsets
- PMD.UseCollectionIsEmpty
- PMD.UnusedLocalVariable
- PMD.SimplifyBooleanReturns where reasonable, suppress where
readability is better without change
- PMD.SimplifyBooleanExpressions

* Include StandardCharsets

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

bundles/org.openhab.binding.dmx/src/main/java/org/openhab/binding/dmx/internal/Util.java

@@ -33,13 +33,7 @@ public class Util {
      * @return true or false
      */
     public static boolean inRange(int value, int min, int max) {
-        if (value < min) {
-            return false;
-        }
-        if (value > max) {
-            return false;
-        }
-        return true;
+        return value >= min && value <= max;
     }
 
     /**