Fix video chat action button tint transition

submodules/ComponentFlow/Source/Base/Transition.swift

@@ -1189,6 +1189,27 @@ public struct ComponentTransition {
         }
     }
     
+    public func animateTintColor(layer: CALayer, from: UIColor, to: UIColor, completion: ((Bool) -> Void)? = nil) {
+        switch self.animation {
+        case .none:
+            completion?(true)
+        case let .curve(duration, curve):
+            let previousColor: CGColor = from.cgColor
+            
+            layer.animate(
+                from: previousColor,
+                to: to.cgColor,
+                keyPath: "contentsMultiplyColor",
+                duration: duration,
+                delay: 0.0,
+                curve: curve,
+                removeOnCompletion: true,
+                additive: false,
+                completion: completion
+            )
+        }
+    }
+    
     public func setGradientColors(layer: CAGradientLayer, colors: [UIColor], completion: ((Bool) -> Void)? = nil) {
         if let current = layer.colors {
             if current.count == colors.count {

submodules/TelegramCallsUI/Sources/VideoChatActionButtonComponent.swift

@@ -267,7 +267,11 @@ final class VideoChatActionButtonComponent: Component {
             } else {
                 tintTransition = .immediate
             }
-            tintTransition.setTintColor(layer: self.background.layer, color: backgroundColor)
+            let previousTintColor = self.background.tintColor
+            self.background.tintColor = backgroundColor
+            if let previousTintColor, previousTintColor != backgroundColor {
+                tintTransition.animateTintColor(layer: self.background.layer, from: previousTintColor, to: backgroundColor)
+            }
             
             let titleFrame = CGRect(origin: CGPoint(x: floor((size.width - titleSize.width) * 0.5), y: size.height + 8.0), size: titleSize)
             if let titleView = self.title.view {