adbd: reduce the USB buffer sizes to 16k.

Some USB controllers only support 16k writes, so drop down to that.

Bug: http://b/130622010
Test: treehugger
Change-Id: I836d5b2d0d6fcae05f290af11a6a19c6e8d7c1ba
(cherry picked from commit 770a6a4d46343dcb5b8ba5c584245c8fc369ac6a)
1 file changed