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/supplicant/1.3/ISupplicant.hal b/wifi/supplicant/1.3/ISupplicant.hal
index 75b7e96..246ce1f 100644
--- a/wifi/supplicant/1.3/ISupplicant.hal
+++ b/wifi/supplicant/1.3/ISupplicant.hal
@@ -26,5 +26,4 @@
  * 1.2 HAL. For example V1_2::ISupplicant::addIface() adds V1_2::ISupplicantIface,
  * which can be cast to V1_3::ISupplicantStaIface.
  */
-interface ISupplicant extends @1.2::ISupplicant {
-};
+interface ISupplicant extends @1.2::ISupplicant {};