android.support升级androidX

androidx.coordinatorlayout.widget.CoordinatorLayout

com.google.android.material.appbar.AppBarLayout

androidx.appcompat.widget.Toolbar

com.google.android.material.floatingactionbutton.FloatingActionButton

implementation'androidx.appcompat:appcompat:1.2.0'

implementation'com.google.android.material:material:1.2.1'

androidx.recyclerview.widget.RecyclerView