Add app source for F-Droid release (v1.0.11)

Adds the full Android source tree, Gradle wrapper and version catalog,
fastlane store metadata in six languages and the fdroiddata build
recipe. .gitignore now also excludes build output and keystores.
README gains build instructions and an updated structure tree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015g6ECVSKcBG8CJPrqC3G5o

fastlane/metadata/android/zh-CN/changelogs/11.txt

@@ -0,0 +1,6 @@
+• Power Hit Radio 与 Power Hit Radio Gold 使用稳定的音频流地址
+• 电台介绍、流派和均衡器预设现已翻译
+• 点按通知即可打开应用；长时间暂停后恢复播放会回到直播
+• 重新连接几分钟后自动停止，不再耗电
+• 在播放器任意位置下滑即可关闭
+• 改进无障碍功能和小屏幕布局