Crash in HttpClientTask

[kober32]

Reported by our client.

It looks like the connection parameter in logRespose might be null here:

https:/wultra/powerauth-mobile-sdk/blob/develop/proj-android/PowerAuthLibrary/src/main/java/io/getlime/security/powerauth/networking/client/HttpClientTask.java#L308

Stacktrace:

java.lang.RuntimeException: An error occurred while executing doInBackground()
    at android.os.AsyncTask$4.done(AsyncTask.java:415)
    at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:381)
    at java.util.concurrent.FutureTask.setException(FutureTask.java:250)
    at java.util.concurrent.FutureTask.run(FutureTask.java:269)
    at io.getlime.security.powerauth.sdk.impl.DefaultExecutorProvider$SerialExecutor$1.run(DefaultExecutorProvider.java:68)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
    at java.lang.Thread.run(Thread.java:1012)
   Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.net.URL java.net.HttpURLConnection.getURL()' on a null object reference
    at io.getlime.security.powerauth.networking.client.HttpClientTask.logResponse(HttpClientTask.java:315)
    at io.getlime.security.powerauth.networking.client.HttpClientTask.doInBackground(HttpClientTask.java:215)
    at android.os.AsyncTask$3.call(AsyncTask.java:394)
    at java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at io.getlime.security.powerauth.sdk.impl.DefaultExecutorProvider$SerialExecutor$1.run(DefaultExecutorProvider.java:68) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644) 
    at java.lang.Thread.run(Thread.java:1012) 

[hvge]

This may happen when the failure occurs very early in the function. The fix should be backported also to release/1.7.x branch.