Add Discord community version (64-bit only)

- Added realracing3-community.apk (71.57 MB)
- Removed 32-bit support (armeabi-v7a)
- Only includes arm64-v8a libraries
- Decompiled source code included
- Added README-community.md with analysis

decompiled-community/sources/com/mbridge/msdk/dycreator/g/a.java

@@ -0,0 +1,24 @@
+package com.mbridge.msdk.dycreator.g;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+/* loaded from: classes4.dex */
+public abstract class a extends com.mbridge.msdk.dycreator.c.a {
+    private List<Object> b = new ArrayList();
+    protected ConcurrentHashMap<Integer, Object> a = new ConcurrentHashMap<>();
+
+    public final synchronized void a(Object obj, int i) {
+        if (obj != null) {
+            ConcurrentHashMap<Integer, Object> concurrentHashMap = this.a;
+            if (concurrentHashMap != null && !concurrentHashMap.containsValue(obj)) {
+                this.a.put(Integer.valueOf(i), obj);
+            }
+        }
+    }
+
+    public final synchronized void a() {
+        this.a.clear();
+    }
+}