feat: add Android live wallpaper native module

WallpaperService with OpenGL ES 2.0 rendering, 6 GLSL
fragment shaders, gyroscope integration, frame capping at
24fps with visibility-based pause. Expo Module API bridge
for config persistence and system wallpaper picker launch.

modules/wallpaper-android/expo-module.config.json

@@ -0,0 +1,6 @@
+{
+  "platforms": ["android"],
+  "android": {
+    "modules": ["com.lively.wallpaper.WallpaperAndroidModule"]
+  }
+}