Fix bugs and add AOSP Android.bp

- gen-db.py: fix DB output path (assets/ not res/raw/)
- DeviceName: use Build.DEVICE for DB lookup, Build.PRODUCT for AltDeviceNames
- DeviceName: fix capitalize() for API 36 (replaceFirstChar)
- DBHelper: add 24h rate-limit on update checks via SharedPreferences
- DBHelper: make DB download atomic (write to .tmp then rename)
- DeviceInfo: wrap getCurrentDeviceInfo() in withContext(Dispatchers.IO)
- DeviceInfo: add 30-day SharedPreferences cache for device image URLs
- AltDeviceNames: rewrite with Entry class + byModel index for O(1) lookup
- Android.bp: add android_library module for AOSP source build

gen-db.py

@@ -7,7 +7,7 @@ from io import StringIO
 
 # Constants
 CSV_URL = "https://storage.googleapis.com/play_public/supported_devices.csv"
-DB_PATH = "library/src/main/res/raw/android-devices.db"
+DB_PATH = "library/src/main/assets/android_devices.db"
 ZIP_PATH = "database/android-devices.zip"
 
 # Ensure output directory exists