DateUtils: make duration rounded up to minutes

app/src/main/java/utils/DateUtils.kt

@@ -9,11 +9,12 @@ import java.util.Date
 class DateUtils {
     companion object {
         /**
-         * Format time duration in seconds as e.g. "2 hours, 1 min", rounded up to minutes.
+         * Format time duration in seconds as e.g. "2 hours, 1 min", rounded to minutes.
          * Used for the duration to the next/previous event in the event details dialog.
          */
         fun formatTimeDuration(context: Context, secondsDiff: Long): String {
-            return formatTimeDurationExact(context,  60L + secondsDiff - (secondsDiff % 60L))
+            val adjusted = (secondsDiff + 30) - (secondsDiff + 30) % 60
+            return formatTimeDurationExact(context, adjusted)
         }
 
         fun formatTimeDurationExact(context: Context, secondsDiff: Long): String {