Improvement/bump gms google auth version

[selcuk-sahin]

Seeing other folks resolve the
below error by updating the google-play SDK version, I made a change that increases default version to latest and allows clients to override this setting.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.XXXXX/com.google.android.gms.auth.api.signin.internal.SignInHubActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference

firebase/firebase-android-sdk#5768

Also, added a check if gapi initialized correctly using initialize method.

As seen on issue #364, this also fixes crashes happens when signIn & signOut called before the initialization.
Instead of crashing, the plugin is now able to reject the promise gracefully.
ref: https://github.com/react-native-google-signin/google-signin/blob/f5ef438aeda0c40f68082dc0b1bddc04bbd6298c/android/src/main/java/com/reactnativegooglesignin/RNGoogleSigninModule.java#L174

[reslear]

Good, you can test on local?

[selcuk-sahin]

Good, you can test on local?

Yes, locally tested on my Android Device API (31) and a simulator (API 33). However, the mentioned error was on the Crashlytics Logs, so I hadn't reproduced that issue.

In my case, the plugin works the same before & after the change.

[selcuk-sahin]

Also, added a check if gapi initialized correctly using initialize method. Please see the updated comment ⬆️