[Android] fixed can't login issue in Google Drive Android API Demos project

https://github.com/googledrive/android-demos

1. Referenct *1 and try to use the Terminal in Android Studio and type

Woindows version:

"keytool -exportcert -alias androiddebugkey -keystore C:\Users\XXXXX.android\debug.keystore -list -v" 

macOS version: 

"keytool -exportcert -alias androiddebugkey -keystore /Users/XXXXX/.android/debug.keystore -list -v"

Not the keystore that you generate, once you want the debug mode.

The path for the "debug.keystore" and the password is "android"

2. Setting SHA1 in https://console.developers.google.com and create OAuth ID and API Key.
And past the key number to your Android Project.

ex:

OAuth ID

 API Key

https://developers.google.com/drive/android/get-started#get_an_android_certificate_and_register_your_application

If you can login sucess from the above step, then you could do the familiar step to use GoogleMap API.

https://developers.google.com/maps/documentation/android-api/signup

reference:
*1 https://github.com/googledrive/android-demos/issues/43
*2 https://github.com/googledrive/android-quickstart/issues/7