CODE EXAMPLE FOR SHELL

AAPT: error: resource android:attr/lStar not found.

ext {
    buildToolsVersion = "29.0.2"
    minSdkVersion = 21
    compileSdkVersion = 29
    targetSdkVersion = 29
    googlePlayServicesAuthVersion = "16.0.1"
    androidXCore = "1.6.0"    //Add this line
}