wifi: Add SAP metered indicated support

The access network type can be used to indicate network metered state.
Add access network type support when create access point.

Test: Manual Test, check client scan IE to show correct interworking
value. see: b/137879206#comment14
Test: atest FrameworksWifiTests
Bug: 137879206

Change-Id: I9f1401ee62f45f2fb0b5e0e95469c2b266eecda6
6 files changed
tree: a511911c50755f0bca58c159eb6894e21f83811b
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg