Wifi-Hal: Set initial value of tcp parameters with zero

Currently on construction of TCPParamCommand, params are
not initialized with default value i.e. ZERO nothing but
it fill with improper data due to which on updation of
throughput event tcp parameter make memory corrupted.

This commit introduces to fill initial value of tcp parameters
i.e. def_tcp_limit_output_bytes and def_tcp_adv_win_scale with
all ZERO.

Change-Id: I8af51fe861b72255c25035b5a57ee853a93fad30
CRs-Fixed: 2502760