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.fineoffsetweatherstation/src/main/java/org/openhab/binding/fineoffsetweatherstation/internal/domain/Measurand.java

@@ -348,8 +348,9 @@ public enum Measurand {
         }
 
         public MeasureType getMeasureType(@Nullable ParserCustomizationType customizationType) {
-            if (customizationType == null)
+            if (customizationType == null) {
                 return measureType;
+            }
             return Optional.ofNullable(customizations).map(m -> m.get(customizationType))
                     .map(ParserCustomization::getMeasureType).orElse(measureType);
         }