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/IWifiStaIface.hal b/wifi/1.5/IWifiStaIface.hal
new file mode 100644
index 0000000..e9d411e
--- /dev/null
+++ b/wifi/1.5/IWifiStaIface.hal
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.wifi@1.5;
+
+import @1.0::WifiStatus;
+import @1.3::IWifiStaIface;
+
+/**
+ * Interface used to represent a single STA iface.
+ *
+ * IWifiChip.createStaIface() must return a @1.5::IWifiStaIface when supported.
+ */
+interface IWifiStaIface extends @1.3::IWifiStaIface {
+    /**
+     * Retrieve the latest link layer stats.
+     * Must fail if |StaIfaceCapabilityMask.LINK_LAYER_STATS| is not set or if
+     * link layer stats collection hasn't been explicitly enabled.
+     *
+     * @return status WifiStatus of the operation.
+     *     Possible status codes:
+     *     |WifiStatusCode.SUCCESS|,
+     *     |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
+     *     |WifiStatusCode.ERROR_NOT_SUPPORTED|,
+     *     |WifiStatusCode.ERROR_NOT_STARTED|,
+     *     |WifiStatusCode.ERROR_NOT_AVAILABLE|,
+     *     |WifiStatusCode.ERROR_UNKNOWN|
+     * @return stats Instance of |LinkLayerStats|.
+     */
+    getLinkLayerStats_1_5() generates (WifiStatus status, StaLinkLayerStats stats);
+};