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.tacmi/src/main/java/org/openhab/binding/tacmi/internal/TACmiBindingConstants.java

@@ -53,5 +53,5 @@ public class TACmiBindingConstants {
             "schema-state-ro");
 
     // Channel specific configuration items
-    public final static String CHANNEL_CONFIG_OUTPUT = "output";
+    public static final String CHANNEL_CONFIG_OUTPUT = "output";
 }

bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/message/DigitalMessage.java

@@ -86,6 +86,7 @@ public final class DigitalMessage extends Message {
      * @param portNumber - the portNumber in Range 1-32
      * @return
      */
+    @SuppressWarnings("PMD.SimplifyBooleanReturns")
     @Override
     public boolean hasPortnumber(int portNumber) {
         if (podNumber == 0 && portNumber <= 16) {