You should create a new directory "android/assets",then put all data in the directory and edit the build_debug_apk.bat ,find this line:
call aapt p -v -f -M AndroidManifest.xml -F bin\%APP_NAME%.ap_ -I %APK_SDK_PLATFORM%\android.jar -S res -m -J gen raw
change to:
call aapt p -v -f -M AndroidManifest.xml -F bin\%APP_NAME%.ap_ -I %APK_SDK_PLATFORM%\android.jar -S res -m -J gen raw -A assets
Thanks and regards!