wlan: Improve W-Fi data transmission stablity.

Update gDataInactivityTimeout parameters from 20 to 200ms to improve
wifi throughput when DUT connect to Broadcom solution Mobile Hotspot.

Bug: 9111171
Change-Id: I49e01fcbd51c2a022c834cba2ab5c6cfc2ea8c10
Signed-off-by: andy2_kuo <andy2_kuo@asus.com>
Signed-off-by: Iliyan Malchev <malchev@google.com>
Merge remote-tracking branch 'upstream/kitkat' into kitkat