MidiManager: fix double BTLE callback
MidiManager: fix double BTLE callback

Stop openBluetoothDevice() from calling its callback twice.

Bug: 23218338
Change-Id: I2e738b22a124c0336c46bef05680a82ee1f59e79
Signed-off-by: Phil Burk <c76ad1a5417d5e5ec6068289c7ca2032944e4216@google.com>
(cherry picked from commit 0ca998d79fe95ded26ec4ff0a1e0a8dc4802684b)

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