Adjust positive RSSI only for some implementation.

Wifi chip can report positive rssi when STA and AP
are very close(close to zero distance apart). There are some
driver implementations where they avoid large negative rssi reporting
by adding with 256. Adjust the RSSI only for such implementations.

Bug: 146811944
Test: Placed STA and AP close to each other and confirmed that all signal bars
are shown indicating strong rssi.

Change-Id: Iab9af736782b2b61692bdf5795b54a28da28bfd0
1 file changed
tree: cee4e3e3b994c48c3b08e89d0e1653bd4b4ff53d
  1. apex/
  2. service/
  3. PREUPLOAD.cfg