fix: manifest放回仓库源码 + APK按版本号命名

- manifest.json/beta/nightly 从Release Assets移到源码仓库
- APK命名: gca-v0.1.0 → v0.1.0-dav-android-debug.apk
- Release #7: 仅含APK(prerelease), manifest从raw URL拉取
- 三渠道manifest: manifest.json / manifest-beta.json / manifest-nightly.json

packages/client-android/manifest.json

@@ -3,10 +3,11 @@
   "builds": {
     "android": {
       "type": "apk",
-      "tag": "v0.1.0-dav-android-6",
-      "url": "https://git.childish-ghost.com/LukeMackin/Yuzu-GCA/releases/download/v0.1.0-dav-android-6/gca-v0.1.0.apk",
+      "tag": "v0.1.0-dav-android-7",
+      "url": "https://git.childish-ghost.com/LukeMackin/Yuzu-GCA/releases/download/v0.1.0-dav-android-7/v0.1.0-dav-android-debug.apk",
       "sha256": "6cd6bbfe07e8b86b06bc328b7b08138dfb00defc71c8bcc98fbb256b2153aba6",
       "size": 3223411,
+      "channel": "stable",
       "minVersion": "0.1.0"
     }
   }