[wpilib] Rename LEDPattern constants to all caps

wpilibc/src/main/native/cpp/hardware/led/LEDPattern.cpp

@@ -297,10 +297,10 @@ LEDPattern LEDPattern::Gradient(GradientType type,
     auto bufLen = data.size();
     int ledsPerSegment = 0;
     switch (type) {
-      case kContinuous:
+      case GradientType::CONTINUOUS:
         ledsPerSegment = bufLen / numSegments;
         break;
-      case kDiscontinuous:
+      case GradientType::DISCONTINUOUS:
         ledsPerSegment = (bufLen - 1) / (numSegments - 1);
         break;
     }

wpilibc/src/main/native/include/wpi/hardware/led/LEDPattern.hpp

@@ -341,19 +341,19 @@ class LEDPattern {
       std::initializer_list<std::pair<double, wpi::util::Color>> steps);
 
   /** Types of gradients. */
-  enum GradientType {
+  enum class GradientType {
     /**
      * A continuous gradient, where the gradient wraps around to allow for
      * seamless scrolling effects.
      */
-    kContinuous,
+    CONTINUOUS,
     /**
      * A discontinuous gradient, where the first pixel is set to the first color
      * of the gradient and the final pixel is set to the last color of the
      * gradient. There is no wrapping effect, so scrolling effects will display
      * an obvious seam.
      */
-    kDiscontinuous
+    DISCONTINUOUS
   };
 
   /**