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.heos/src/main/java/org/openhab/binding/heos/internal/action/HeosActions.java

@@ -37,7 +37,7 @@ import org.slf4j.LoggerFactory;
 @NonNullByDefault
 public class HeosActions implements ThingActions {
 
-    private final static Logger logger = LoggerFactory.getLogger(HeosActions.class);
+    private static final Logger logger = LoggerFactory.getLogger(HeosActions.class);
 
     private @Nullable HeosBridgeHandler handler;
 

bundles/org.openhab.binding.heos/src/main/java/org/openhab/binding/heos/internal/handler/HeosChannelHandlerGrouping.java

@@ -43,7 +43,6 @@ public class HeosChannelHandlerGrouping extends BaseHeosChannelHandler {
     @Override
     public void handleGroupCommand(Command command, @Nullable String id, ThingUID uid,
             HeosGroupHandler heosGroupHandler) throws IOException, ReadException {
-
         if (command instanceof RefreshType) {
             return;
         }

bundles/org.openhab.binding.heos/src/main/java/org/openhab/binding/heos/internal/handler/HeosThingBaseHandler.java

@@ -278,7 +278,6 @@ public abstract class HeosThingBaseHandler extends BaseThingHandler implements H
         }
 
         switch (command) {
-
             case PLAYER_STATE_CHANGED:
                 playerStateChanged(eventObject);
                 break;