Add filters to AccontTimelineFragment

mastodon/src/main/java/org/joinmastodon/android/ui/drawables/EmptyDrawable.java

@@ -0,0 +1,48 @@
+package org.joinmastodon.android.ui.drawables;
+
+import android.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.PixelFormat;
+import android.graphics.drawable.Drawable;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+public class EmptyDrawable extends Drawable{
+	private final int width, height;
+
+	public EmptyDrawable(int width, int height){
+		this.width=width;
+		this.height=height;
+	}
+
+	@Override
+	public void draw(@NonNull Canvas canvas){
+
+	}
+
+	@Override
+	public void setAlpha(int alpha){
+
+	}
+
+	@Override
+	public void setColorFilter(@Nullable ColorFilter colorFilter){
+
+	}
+
+	@Override
+	public int getOpacity(){
+		return PixelFormat.TRANSPARENT;
+	}
+
+	@Override
+	public int getIntrinsicWidth(){
+		return width;
+	}
+
+	@Override
+	public int getIntrinsicHeight(){
+		return height;
+	}
+}