Merge "Added missing comments in Instrumentation#sendStringSync"

        if (events != null) {

            for (int i = 0; i < events.length; i++) {

                // We have to change the time of an event before injecting it because

                // all KeyEvents returned by KeyCharacterMap.getEvents() have the same

                // time stamp and the system rejects too old events. Hence, it is

                // possible for an event to become stale before it is injected if it

                // takes too long to inject the preceding ones.

                sendKeySync(KeyEvent.changeTimeRepeat(events[i], SystemClock.uptimeMillis(), 0));

            }

        }