Revert "call getName() from CachedBluetoothDevice, not CachedBluetoothDeviceManager"

This reverts commit 3029efc5.

Reason for revert:
To fix null pointer crash in Pairing dialog. Dialog maybe triggered by intent, in which LocalBluetoothManager couldn't have instance for BluetoothDevice and will return null. As a result, we need to depend on method in CachedBluetoothManager to handle it.

Bug: 115754654
Bug: 112735753
Change-Id: I1ebf1f1c2829cfb75e6c382df5acf785fe54a185