wifi: Add STA + STA HIDL API's

Add the HIDL API's + shim + VTS tests.

Bug: 170305665
Test: atest VtsHalWifiV1_3TargetTest VtsHalWifiV1_5TargetTest
Change-Id: I26ada11aebfe8082bfda251cf7e6990e0aa08a06
diff --git a/wifi/1.5/Android.bp b/wifi/1.5/Android.bp
index ecb0a35..5a62a3a 100644
--- a/wifi/1.5/Android.bp
+++ b/wifi/1.5/Android.bp
@@ -9,6 +9,7 @@
         "IWifiChip.hal",
         "IWifiNanIface.hal",
         "IWifiNanIfaceEventCallback.hal",
+        "IWifiStaIface.hal",
     ],
     interfaces: [
         "android.hardware.wifi@1.0",