Allow outgoing A2DP connection when pairing via NFC

If Bluetooth is disabled, pairing via NFC will start the Bluetooth
Adapter service in Quiet Mode. In such mode only the incoming A2DP
connection requests should be rejected - the outgoing A2DP connection
requests should be allowed.

Bug: 79330878
Test: Manual: (1) Disable Bluetooth; (2) Pair with a Headset via NFC;
      (3) Play music. Updated existing unit tests.

Change-Id: I3dd892b963116c8f169f63bb117401a4a078ab9c