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.transform.scale/src/main/java/org/openhab/transform/scale/internal/Range.java

@@ -74,6 +74,7 @@ public class Range {
         this.maxInclusive = maxInclusive;
     }
 
+    @SuppressWarnings("PMD.SimplifyBooleanReturns")
     public boolean contains(final BigDecimal value) {
         final boolean minMatch;
         if (min == null) {