Raj slumped back in his chair. "Son of a..." It was a bad repack. Someone had likely injected a bitcoin miner or adware into the services framework. Using this would brick the kiosks or, worse, compromise the payment data.
The keyword specifies android 90 , which corresponds to Android 9.0 Pie (API 28). This build is specifically compiled to work with the underlying framework of Android Pie. While newer versions (Android 10, 11, 12, 13, 14) exist, some older devices or custom ROMs are permanently on Android 9.0. Using a newer Play Services build on Android 9.0 can cause signature mismatches or missing symbol errors.