da432283cf
The response for manual network selection request may come after the fragment that displays the search results is already destroyed, say when the user moves out of the results screen. In this case, attempting to update the summary for the chosen operator preference leads to an exception. Check whether the preference to be updated is still valid before attempting to update its summary. Bug: 161422555 Test: Manually tested - verified that no exception was thrown when the response of manual network selection request was received after the fragment was destroyed. Change-Id: I087c0e101fa75f229bc4353defbb14e8bf30153f