Simplify capture invalidation

Remove the unnecessary requestInvalidate() indirection. Use a single
invalidate() method instead.

server/src/main/java/com/genymobile/scrcpy/control/Controller.java

@@ -751,7 +751,7 @@ public class Controller implements AsyncProcessor, VirtualDisplayListener {
     private void resetVideo() {
         if (surfaceCapture != null) {
             Ln.i("Video capture reset");
-            surfaceCapture.requestInvalidate();
+            surfaceCapture.invalidate();
         }
     }
 }

server/src/main/java/com/genymobile/scrcpy/video/CameraCapture.java

@@ -418,9 +418,4 @@ public class CameraCapture extends SurfaceCapture {
     public boolean isClosed() {
         return disconnected.get();
     }
-
-    @Override
-    public void requestInvalidate() {
-        // do nothing (the user could not request a reset anyway for now, since there is no controller for camera mirroring)
-    }
 }

server/src/main/java/com/genymobile/scrcpy/video/NewDisplayCapture.java

@@ -261,9 +261,4 @@ public class NewDisplayCapture extends SurfaceCapture {
         int num = size.getMax();
         return initialDpi * num / den;
     }
-
-    @Override
-    public void requestInvalidate() {
-        invalidate();
-    }
 }

server/src/main/java/com/genymobile/scrcpy/video/ScreenCapture.java

@@ -211,9 +211,4 @@ public class ScreenCapture extends SurfaceCapture {
             SurfaceControl.closeTransaction();
         }
     }
-
-    @Override
-    public void requestInvalidate() {
-        invalidate();
-    }
 }

server/src/main/java/com/genymobile/scrcpy/video/SurfaceCapture.java

@@ -19,9 +19,9 @@ public abstract class SurfaceCapture {
     private CaptureListener listener;
 
     /**
-     * Notify the listener that the capture has been invalidated (for example, because its size changed).
+     * Notify the listener that the capture has been invalidated (for example, because its size changed, or due to a manual user request).
      */
-    protected void invalidate() {
+    public void invalidate() {
         listener.onInvalidated();
     }
 
@@ -86,11 +86,4 @@ public abstract class SurfaceCapture {
     public boolean isClosed() {
         return false;
     }
-
-    /**
-     * Manually request to invalidate (typically a user request).
-     * <p>
-     * The capture implementation is free to ignore the request and do nothing.
-     */
-    public abstract void requestInvalidate();
 }