Request: update dependencies and replace deprecated usages

[AndroidDeveloperLB]

compileSdkVersion 25 - should be 29
buildToolsVersion '25.0.3'  - should be removed
targetSdkVersion 25 - should be 29

implementation 'com.android.support:appcompat-v7:25.3.1'
implementation 'com.android.support:design:25.3.1'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:support-v4:25.3.1'

-should use android x

implementation 'com.android.support:design:25.3.1'
implementation 'com.google.android.gms:play-services-base:11.0.1'
implementation 'com.google.android.gms:play-services-identity:11.0.1'
implementation 'com.google.android.gms:play-services-auth:11.0.1'
implementation 'com.google.android.gms:play-services-auth-api-phone:11.0.1'

-all of these are very outdated and the samples use deprecated classes and functions.