Add support for getConnectionCapabilities API

This commit adds the implementation for the API
getConnectionCapabilities() in ISupplicantStaIface HAL.

This is used to return the Wifi support of the connection on
this STA interface.

Bug: 138634524
Bug: 140168755
Test: Manual
Test: VTS test
Change-Id: I3d345f99f554109e57581b9774d2653ffd1358b0
2 files changed