fix building

src/main/java/com/b44t/messenger/rpc/Reaction.java

@@ -0,0 +1,39 @@
+package com.b44t.messenger.rpc;
+
+import androidx.annotation.Nullable;
+
+public class Reaction {
+    // The reaction emoji string.
+    private final String emoji;
+    // The count of users that have reacted with this reaction.
+    private final int count;
+    // true if self-account reacted with this reaction, false otherwise.
+    private final boolean isFromSelf;
+
+    public Reaction(String emoji, int count, boolean isFromSelf) {
+        this.emoji = emoji;
+        this.count = count;
+        this.isFromSelf = isFromSelf;
+    }
+
+    public String getEmoji() {
+        return emoji;
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public boolean isFromSelf() {
+        return isFromSelf;
+    }
+
+  @Override
+  public boolean equals(@Nullable Object obj) {
+    if (obj instanceof Reaction) {
+      Reaction reaction = (Reaction) obj;
+      return emoji.equals(reaction.getEmoji()) && count == reaction.getCount() && isFromSelf == reaction.isFromSelf();
+    }
+    return false;
+  }
+}