Prefer the name from the route for Bluetooth devices.

Whenever available use the name from the MediaRoute2Info object because
`CachedBluetoothDevice#getName` results in an IPC call.

Bug: 414668703
Flag: com.android.media.flags.avoid_binder_calls_during_render
Test: atest SettingsLibRoboTests:com.android.settingslib.media.BluetoothMediaDeviceTest,
 on a device.
Change-Id: I15b872410cf72987d8f4938116a9a273776aa952