chore: add barHeight and handleHeight properties.

Author: yujunetee

lib/src/material/material_progress_bar.dart

@@ -7,6 +7,8 @@ class MaterialVideoProgressBar extends StatelessWidget {
   MaterialVideoProgressBar(
     this.controller, {
     this.height = kToolbarHeight,
+    this.barHeight = 10,
+    this.handleHeight = 6,
     ChewieProgressColors? colors,
     this.onDragEnd,
     this.onDragStart,
@@ -15,6 +17,8 @@ class MaterialVideoProgressBar extends StatelessWidget {
   }) : colors = colors ?? ChewieProgressColors();
 
   final double height;
+  final double barHeight;
+  final double handleHeight;
   final VideoPlayerController controller;
   final ChewieProgressColors colors;
   final Function()? onDragStart;
@@ -25,8 +29,8 @@ class MaterialVideoProgressBar extends StatelessWidget {
   Widget build(BuildContext context) {
     return VideoProgressBar(
       controller,
-      barHeight: 10,
-      handleHeight: 6,
+      barHeight: barHeight,
+      handleHeight: handleHeight,
       drawShadow: true,
       colors: colors,
       onDragEnd: onDragEnd,