Update build.gradle

[martinglova]

To get rid of the following warning:

WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html

[pavankumarkl]

Hi Martin,
Finger print popup does not come on android but works fine on iOS, is this expected behavior please update