RDKB-27962: VAP Percentage Telemetry always prints 28
RDKB-27962: VAP Percentage Telemetry always prints 28

Reason for change: fix to hold large number
Test Procedure: Check the vap up percentage in wifihealth.txt
Risks: None

Signed-off-by: ndandu <eab1fa3815c97e61611dfdd97a784538e44d3fa7@comcast.com>
(cherry picked from commit 7e2fbfeb2cc43c5404d52e3dedde802234fd2719)
Change-Id: I6269b1803a791326a1d70b299716d2aa2f375b8b

rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent