Input validation

The Tecno Camon iClick 2 Android device with a build fingerprint of TECNO/H622/TECNO-ID6:8.1.0/O11019/F-180824V116:user/release-keys contains a pre-installed platform app with a package name of com.lovelyfont.defcontainer versionCode=7, versionName=7.0.11. This app contains an exported service...