Wifi: Add getConnectionCapabilities API

This commit adds the API for getConnectionCapabilities() in
ISupplicantStaIface HAL. This is used to return the Wifi support
for the connection on this STA interface.

Bug: 138634524
Bug: 140168755
Test: Manual
Test: VTS test
Change-Id: I24ff3c16434067e41491298e41041bdfdf06452a
diff --git a/wifi/1.4/IWifi.hal b/wifi/1.4/IWifi.hal
index f4bc618..765e09d 100644
--- a/wifi/1.4/IWifi.hal
+++ b/wifi/1.4/IWifi.hal
@@ -24,5 +24,4 @@
  * module loaded in the system.
  * IWifi.getChip() must return @1.2::IWifiChip
  */
-interface IWifi extends @1.3::IWifi {
-};
+interface IWifi extends @1.3::IWifi {};