According to https://github.com/abhi-r3v0/EVABS:
An open source Android application that is intentionally vulnerable so as to act as a learning platform for Android application security beginners. The effort is to introduce beginners with very limited or zero knowledge to some of the major and commonly found real-world based Android application vulnerabilities in a story-based, interactive model. EVABS follows a level-wise difficulty approach and in each level, the player learns a new concept. This project is still under progress and aims at incorporating as many levels as possible.
Challenge 1
$ adb logcat
...
07-18 09:35:42.990 2809 2809 D ** SYS_CTRL **: :
EVABS{logging_info_never_safel}