[cscore] Add BGRA support (#6365)

wpiutil/src/main/java/edu/wpi/first/util/PixelFormat.java

@@ -21,7 +21,9 @@ public enum PixelFormat {
   /** Grayscale, 16 bpp. */
   kY16(6),
   /** YUV 4:2:2, 16 bpp. */
-  kUYVY(7);
+  kUYVY(7),
+  /** BGRA 8-8-8-8. 32 bpp. */
+  kBGRA(8);
 
   private final int value;
 

wpiutil/src/main/native/include/wpi/RawFrame.h

@@ -55,6 +55,7 @@ enum WPI_PixelFormat {
   WPI_PIXFMT_GRAY,         // Grayscale, 8 bpp
   WPI_PIXFMT_Y16,          // Grayscale, 16 bpp
   WPI_PIXFMT_UYVY,         // YUV 4:2:2, 16 bpp
+  WPI_PIXFMT_BGRA,         // BGRA 8-8-8-8-, 32 bpp
 };
 
 // Returns nonzero if the frame data was allocated/reallocated