Bluedroid: Fix HCI buffer size issue

The maximum HCI frame coming from the kernel is
the maximum ACL HCI data packet (1024) + ACL HCI
header (4) + H4 header (1) = 1029.
Previous maximum read value was 1016 which is
incorrect and leads to data sync problem for
frames > 1016.

Change-Id: I37f74ad4c612d802e6758b3fe0eb156bcf265b4f
Signed-off-by: Loic Poulain <loic.poulain@intel.com>