Remove urb request size maximum for P api

The 16kB maximum for transfers was removed from
the kernel in 3.3. Devio has since supported
arbitrary transfer sizes through scatter gather.

See the following kernel patches for context:
"USB: change the memory limits in usbfs URB submission"
"usbdevfs: Use scatter-gather lists for large bulk transfers".

Larger buffer sizes will be allowed for apps targeting
P and greater. For apps targeting previous apis, the
previous behavior of truncating length to 16384 will
be applied here instead of libusbhost, for bulk transfers
and queue(ByteBuffer, int). The previous behavior
of throwing an exception will continue to apply
for queue(ByteBuffer).

Bug: 67683483
Test: Run usb_async_test app with USB3 : 38MB/s -> 300MB/s
Test: CtsVerifier UsbDeviceTests pass
Change-Id: Ia52440cb725561b0f1db1a75aa1b8ab952585826