conversation: send video/message

For now message could not be recorded during call.

Change-Id: If1d0e4755beeb0b9c215c618de03d15d85ddf8c2
diff --git a/src/NSString+Extensions.h b/src/NSString+Extensions.h
index b1b73d9..35d0c6c 100644
--- a/src/NSString+Extensions.h
+++ b/src/NSString+Extensions.h
@@ -23,5 +23,6 @@
 
 - (NSString *) removeAllNewLinesAtTheEnd;
 - (NSString *) removeEmptyLinesAtBorders;
++ (NSString *) formattedStringTimeFromSeconds:(int) totalSeconds;
 
 @end