UsbManager: Remove redundant Intent extras from USB device and accessory broadcasts

These extras are also accessable via the UsbDevice and UsbAccessory classes,
which are also included as extras.
Since you can't filter Intents based on extras there is no point in duplicating
this information as separate extras.

Change-Id: I4c8d1e70d66023a1800b3f8f06118898da6b37af
Signed-off-by: Mike Lockwood <lockwood@android.com>