wifi: Support force channel test command in dual AP UI

The bridged AP mode will init two interfaces when SAP start.
The force channel should handle in WifiApConfigStore.
Handle it in HostapdHal will cause interface mismatch in bridged support
project.

Also add command "force-softap-band" to support forcing the band.

Test: atest -c FrameworksWifiTests
Test: adb shell cmd wifi force-softap-channel enabled 2412 & turn on
SAP from UI
Test: adb shell cmd wifi force-softap-band enabled 2 & turn on
SAP from UI
Bug: 177787156
Bug: 184899621

Change-Id: I94960d23f36e22d49aac6c8e41edf590a9c50c74
5 files changed