Wifi: Uprev Wifi HAL to 1.4

Move Wifi HAL from 1.3 to 1.4
This commit also include adding the VINTF fragment definition for IWifi
hal.

Bug: 138243400
Test: Builds and wifi works
Change-Id: I5ec9b21f8d6b7e1b5b5e47e26681dd4ed3ffcc2d
diff --git a/wifi/1.4/IWifi.hal b/wifi/1.4/IWifi.hal
new file mode 100644
index 0000000..f4bc618
--- /dev/null
+++ b/wifi/1.4/IWifi.hal
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2019 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@1.4;
+
+import @1.3::IWifi;
+
+/**
+ * This is the root of the HAL module and is the interface returned when
+ * loading an implementation of the Wi-Fi HAL. There must be at most one
+ * module loaded in the system.
+ * IWifi.getChip() must return @1.2::IWifiChip
+ */
+interface IWifi extends @1.3::IWifi {
+};