AudioService: Allow late Bluetooth profile service connection

If a Bluetooth device is connected by the Bluetooth stack
before the corresponding profile service proxy has been initialized via
the onServiceConnected callback, ignore the connecion request. When the
service connection is received later, query the Bluetooth adapter for
active devices on this profile and connected it.

Also move resetting forced usage for media upon LE devices connection from
AudioDeviceInventory.setBluetoothActiveDevice() to makeLeAudioDeviceAvailable()
for consistency with A2DP.

Bug: 295985930
Test: quickly disable/enable Bluetooth and verify music playback

Change-Id: If598db52061417c8973bed506a689c92825b798a