No support for MultiDex apps

apk_builder won't be able to find the launchable activity if the apps has MultiDex support since there might be multiple smalli folders.

In my case it was in the folder smali_classes2.

~/Documents/github/appmon/apk_builder ✖ tree /tmp/appmon_apk/com.xxx.xxx/ -L 1
/tmp/appmon_apk/com.xxx.xxx/
├── AndroidManifest.xml
├── apktool.yml
├── assets
├── build
├── kotlin
├── lib
├── original
├── res
├── smali
├── smali_classes2
├── smali_classes3
├── smali_classes4
└── unknown

More info:

• https://github.com/iBotPeaches/Apktool/issues/1294
• https://developer.android.com/studio/build/multidex.html