feat: add initial configuration and resources for nep9 module

- Introduced build.gradle for the nep9 module with application ID and Firebase configuration.
- Added AndroidManifest.xml with necessary permissions and application setup.
- Implemented Firebase messaging service for push notifications.
- Included drawable and mipmap resources for app branding.
- Created .gitignore to exclude build and release directories.
- Added proguard rules for code obfuscation and optimization.
- Established network security configuration and file provider paths.

nep9/src/main/res/xml/provider_paths.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding= "utf-8"?>
+<resources>
+    <paths >
+        <external-path name="external_files" path="."/>
+        <root-path name="root" path="." />
+        <files-path name="files" path="." />
+        <cache-path name="cache" path="." />
+        <external-files-path name="external_files_f" path="." />
+        <external-cache-path name="external_cache" path="." />
+    </paths >
+</resources>
+<!-- 适配7.0及其以上，配合com.eva.android.OpenFileUtil，用于解决调用系统Intent查看大文件内
+    容、拍照保存图片的功能时出现"android.os.FileUriExposedException"异常的问题 -->