Show time for calls #3930

[SmsS4]

issue #3930
Hi. I added timestamp for calls and here is the result

Note: third Income call doesn't have duration but it's not a bug.
I don't know why this happens but Conversation handle incoming call string like this:

if (received) {
                if (duration > 0) {
                    viewHolder.status_message.setText(activity.getString(R.string.incoming_call_duration_timestamp, TimeFrameUtils.resolve(activity, duration), callTime));
                } else if (rtpSessionStatus.successful) {
                    viewHolder.status_message.setText(activity.getString(R.string.incoming_call_timestamp, callTime));
                } else {
                    viewHolder.status_message.setText(activity.getString(R.string.missed_call_timestamp, callTime));
                }
            } 

And in second case we have an incoming call without a duration.
Also i didn't add other languages because i didn't know does this feature accept by developers or not.
btw i'm new to android and solving issues and i didn't know should i make a PR or just comment on issue.
so sorry if i shouldn't do this :)

Sorry for my bad English.

[sonicnkt]

Just wanted to comment that i would love to have this added to conversations.
I never realized this wasnt there allready until i had the typical siuation of call me again in 30 minutes and continued with other stuff. Then i went back to app an realized call time (and duration) wasnt logged there at all :)