Transmitted packets that contained multiple MIDI messages and that did not use running status were missing a timestamp! This CL fixes that bug. Bug: 34708799 Test: a manual test using MidiMatrix is described in the bug report Change-Id: Iddb55e01c60625787c5907fe8e4b202ef1415e59 Signed-off-by: Phil Burk <philburk@google.com>