Use Java 17 features (#6691)

Uses enhanced instanceof (and simplify equals methods)
Uses switch expressions and arrow labels
Seal and finalize some Shuffleboard classes

Co-authored-by: Sam Carlberg <sam@slfc.dev>

wpiunits/src/main/java/edu/wpi/first/units/MutableMeasure.java

@@ -286,14 +286,9 @@ public final class MutableMeasure<U extends Unit<U>> implements Measure<U> {
 
   @Override
   public boolean equals(Object o) {
-    if (this == o) {
-      return true;
-    }
-    if (!(o instanceof Measure)) {
-      return false;
-    }
-    Measure<?> that = (Measure<?>) o;
-    return Objects.equals(m_unit, that.unit()) && this.isEquivalent(that);
+    return o instanceof Measure<?> that
+        && Objects.equals(m_unit, that.unit())
+        && this.isEquivalent(that);
   }
 
   @Override