Multi-A2DP support - add a new internal API to suppress Audio Noisy intent

The new API setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent()
is similar to the existing setBluetoothA2dpDeviceConnectionState()
except that it takes one extra argument that indicates whether the
AudioManager.ACTION_AUDIO_BECOMING_NOISY intent will be sent:

  setBluetoothA2dpDeviceConnectionStateSuppressNoisyIntent(
      ..., boolean suppressNoisyIntent)

This API is needed so the Active A2DP Sink device can be changed
while audio is streaming, and the audio continues playing on the new
Active Device.

Bug: 69269748
Test: Manual: multiple connected A2DP devices, and selecting each as
      the Active Device.

Change-Id: I75766a58d9e6b42b3ce68bd9ad3a7a72ca5a1023
(cherry picked from commit 82e06463)