feat: increase corner-radius of watch-progressbar

Adds a rounded corner to the watch-progressbar, making it more inline
with the general design of the app, as well as how other progressbars
are styled.

Author: FineFindus

app/src/main/java/com/github/libretube/ui/extensions/SetWatchProgressLength.kt

@@ -1,7 +1,9 @@
 package com.github.libretube.ui.extensions
 
 import android.graphics.Color
+import android.graphics.Outline
 import android.view.View
+import android.view.ViewOutlineProvider
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.graphics.ColorUtils
 import androidx.core.view.isGone
@@ -36,5 +38,14 @@ fun View.setWatchProgressLength(videoId: String, duration: Long) {
     }
     setBackgroundColor(backgroundColor)
 
+    // set corner-radius
+    clipToOutline = true
+    outlineProvider = object : ViewOutlineProvider() {
+        override fun getOutline(view: View, outline: Outline) {
+            outline.setRoundRect(0, 0, view.width, view.height, 16f)
+        }
+    }
+
+
     isVisible = true
 }