[PATCH] Fix SyetemUI can not get the new profile connect state after device reboot

Bluetooth will automatically open after device reboot.
SystemUI will construct LocalBluetoothManager, readPairedDevices will be called in the construction of LocalBluetoothmanager.
Since mLocalBluetoothManager.getEventManager.registerCallback is after the LocalBluetoothManager's construction.
SystemUI does not receive the message onDeviceAdded. As a result, CacheDevice.registerCallback cannot be registered later.
So the device cannot receive the OnDeviceAttributesChanged message when the device connects to the second profile.

Fixes: 136606985

Test: manual
1. Open BT, connect a bluetooth headset, a bluetooth mouse。
2. Reboot the device.
3. After the bluetooth headset auto connect, connect the bluetooth mouse again.
4. Check the status bar.

Change-Id: I460e632943f445a19f2273a5b1087ba1c27d841c