refactor(Tumblr): Use a common filter patch

app/src/main/java/app/revanced/tumblr/patches/TimelineFilterPatch.java

@@ -0,0 +1,28 @@
+package app.revanced.tumblr.patches;
+
+import android.util.Log;
+
+import com.tumblr.rumblr.model.TimelineObject;
+import com.tumblr.rumblr.model.TimelineObjectType;
+import com.tumblr.rumblr.model.Timelineable;
+
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Objects;
+
+public class TimelineFilterPatch {
+    public static void filterTimeline(List<TimelineObject<? extends Timelineable>> timelineObjects) {
+        Iterator<TimelineObject<? extends Timelineable>> iterator = timelineObjects.iterator();
+        while (iterator.hasNext()) {
+            TimelineObject<? extends Timelineable> timelineElement = iterator.next();
+            if (timelineElement == null) continue;
+            String elementType = timelineElement.getData().getTimelineObjectType().toString();
+
+            // This dummy gets removed by the TimelineFilterPatch and in its place,
+            // equivalent instructions with a different constant string
+            // will be inserted for each Timeline object type filter.
+            if ("BLOCKED_OBJECT_DUMMY".equals(elementType)) iterator.remove();
+        }
+    }
+}

dummy/src/main/java/com/tumblr/rumblr/model/TimelineObject.java

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+package com.tumblr.rumblr.model;
+
+public class TimelineObject<T extends Timelineable> {
+    public final T getData() {
+        throw new UnsupportedOperationException("Stub");
+    }
+
+}

dummy/src/main/java/com/tumblr/rumblr/model/TimelineObjectType.java

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+package com.tumblr.rumblr.model;
+
+public enum TimelineObjectType {
+}

dummy/src/main/java/com/tumblr/rumblr/model/Timelineable.java

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+package com.tumblr.rumblr.model;
+
+public interface Timelineable {
+    TimelineObjectType getTimelineObjectType();
+}