feat: 新增 bb8au 模块的基础配置和资源文件

- 添加 build.gradle、AndroidManifest.xml、Firebase 消息服务、主题样式等文件
- 包含 .gitignore 文件以忽略 build 和 release 目录
- 新增资源文件如 drawable、mipmap 和 values 目录

u8888aud/proguard-rules.pro

@@ -0,0 +1,32 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
+
+-dontwarn dalvik.**
+-dontwarn com.tencent.smtt.**
+
+-keep class com.tencent.smtt.** {
+    *;
+}
+
+-keep class com.tencent.tbs.** {
+    *;
+}