Kotlin App - add scores at the end of test

[omrisarig13]

After the user finishes a test, he moves to the "test finished" screen.
Currently, this page only contains the words "Test Ended!".

This screen should let the user see the results of the test (how man questions were asked, and how many he answered correctly). Adding this should be very easy, since this information already exists at the end of the test, all that should be done is to send this information to the test_result fragment and display it there.

Ideally, this page will also show the questions that were asked, and the answer that the user has given for every question. This is a bit more tricky to do. To do it, we should redesign the test action a bit, so it will save all the questions and the answers during the test, and move them to the result fragment at the end of the test.