Audio service: no double message handling for A2DP device connection

  This change affects the implementation of the
setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent method:
when the computed delay before making the device available or not
available anymore is 0, perform the operation synchronously. The
AudioManager method is still asynchronous, but this prevent
yet another message to be processed on the AudioDeviceBroker queue.
  The previous implementation was causing the following message to
sometimes be observed in the logs:
"invalid null DeviceInfo in onBluetoothA2dpActiveDeviceChange" and
was due to the following sequence of calls when an A2DP device would
connect: (AM=AudioManager, AS=AudioService, ADI=AudioDeviceInventory,
ADB=AudioDeviceBroker)
BT service would call
 AM.setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent
 AM.handleBluetoothA2dpDeviceConfigChange
which was translating into the following:
AM.setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent
   AS.setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent
      > ADB.postBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent -> MSG_L_A2DP_DEVICE_CONNECTION_CHANGE_EXT
AM.handleBluetoothA2dpDeviceConfigChange
   AS.handleBluetoothA2dpDeviceConfigChange
      > ADB.postBluetoothA2dpDeviceConfigChange ->MSG_L_A2DP_DEVICE_CONFIG_CHANGE

MSG_L_A2DP_DEVICE_CONNECTION_CHANGE_EXT
   > ADI.setBluetoothA2dpDeviceConnectionState
      > delay = checkSendBecomingNoisyIntentInt
      > ADB.postA2dpSinkConnection(delay)     -> MSG_IL_SET_A2DP_SINK_CONNECTION_STATE

MSG_L_A2DP_DEVICE_CONFIG_CHANGE
   > ADI.onBluetoothA2dpActiveDeviceChange
      AS.AudioDeviceInventory: invalid null DeviceInfo in onBluetoothA2dpActiveDeviceChange
      => doesn't call  AudioSystem.handleDeviceConfigChange
                      ADB.postSetVolumeIndexOnDevice(vol, A2DP)

MSG_IL_SET_A2DP_SINK_CONNECTION_STATE
   > ADI.onSetA2dpSinkConnectionState
      > ADB.postSetVolumeIndexOnDevice()
          > AS.postSetVolumeIndexOnDevice  -> MSG...
      > makeA2dpDeviceAvailable: mConnectedDevices.put(...)

with the new implementation we get:

AM.setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent
   AS.setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent
      > ADB.postBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent -> MSG_L_A2DP_DEVICE_CONNECTION_CHANGE_EXT
AM.handleBluetoothA2dpDeviceConfigChange
   AS.handleBluetoothA2dpDeviceConfigChange
      > ADB.postBluetoothA2dpDeviceConfigChange ->MSG_L_A2DP_DEVICE_CONFIG_CHANGE

MSG_L_A2DP_DEVICE_CONNECTION_CHANGE_EXT
   > ADI.setBluetoothA2dpDeviceConnectionState
      > delay = checkSendBecomingNoisyIntentInt
      > if delay == 0 then ADI.onSetA2dpSinkConnection()
          > AS.postSetVolumeIndexOnDevice  -> MSG...
          > makeA2dpDeviceAvailable: mConnectedDevices.put(...)

MSG_L_A2DP_DEVICE_CONFIG_CHANGE
   > ADI.onBluetoothA2dpActiveDeviceChange
      > AudioSystem.handleDeviceConfigChange
      > ADB.postSetVolumeIndexOnDevice(vol, A2DP)

Bug: 132602437
Bug: 132416679
Test: connect/disconnect A2DP devices and verify "dumpsys audio" for
absence of "invalid null DeviceInfo" messages

Change-Id: If9afd6174f8e49273ce20912a60b2f64b19b6d94