am 559a2420: Merge "MidiDevice: document that opens can return nulls" into mnc-dev
am 559a2420: Merge "MidiDevice: document that opens can return nulls" into mnc-dev

* commit '559a2420d396ef7a7c7bcab012bef379ad864bff':
  MidiDevice: document that opens can return nulls

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base