wpa_supplicant(hidl): Correct the Wfd length

Bug: 36401779
Test: Compiles
Test: Able to find P2p devices now:
03-17 23:49:29.522   716   737 I ActivityManager: Displayed
com.android.settings/.Settings$WifiP2pSettingsActivity: +114ms
03-17 23:49:32.667  3128  3128 I wpa_supplicant: P2P-DEVICE-FOUND
02:04:4b:3a:31:60 p2p_dev_addr=02:04:4b:3a:b1:60
pri_dev_type=10-0050F204-5 name='Android_e9f3' config_methods=0x0
dev_capab=0x25 group_capab=0x2b vendor_elems=1 new=1

Change-Id: I0655b7c31f3a7bd113d1be4385af12d9e30f6ef9
3 files changed