wifi: Add AP interface idx mechanism & predefine interface support.

SAP Interface idx mechanism.
STA+STA support, AP+AP will use wlan2 & wlan3, single AP use wlan2
STA+STA doesn't support, AP+AP use wlan1 & wlan 2, single AP use
wlan 1
STA+AP doesn't support, AP + AP will take wlan0 & wlan 1 but single AP
use wlan0 (Ideally it should not happen)

Add predefine interface support for bridged AP interface.
(property: ro.vendor.sap.concurrent.interface)

PS: Rename: getApIfaceName to getPredefinedApIfaceName since it
duplicates public HAL API: getApIfaceName

AP+AP Part 4 includes:
1. Support API to indicate Bridged AP supported or not
2. SAP Interface idx mechanism.

Bug: 162686273
Bug: 173999527
Test: atest -c VtsHalWifiApV1_0TargetTest
Test: atest -c VtsHalWifiApV1_4TargetTest
Test: atest -c VtsHalWifiApV1_5TargetTest
Change-Id: I115e294ac2be201cfa3a58cfa0a8a98b481b29de