Refactor GoogleLoginFragment.
Refactor GoogleLoginFragment.

The authentication was started in OnStart which is the most likelly
culprit for #46. Closes #46.

masterrr/mobile,peeedge/mobile,eatskolnikov/mobile,ZhangLeiCharles/mobile,ZhangLeiCharles/mobile,masterrr/mobile,peeedge/mobile,eatskolnikov/mobile,eatskolnikov/mobile