wifi: Move legacy HAL implementation

Changes in the CL:
1. Move the legacy HAL implementation from
"frameworks/opt/net/wifi/wifi_hal_legacy" to
"hardware/interfaces/wifi/1.0/default".
2. Renamed the .rc file and the module name in makefile to
conform to the HIDL style guide.

Files renamed from:
wifi_hal_service.cpp/h -> wifi.cpp/h
wifi_chip_service.cpp/h -> wifi_chip.cpp/h
main.cpp -> service

Bug: 31821133
Test: mmma -j32 hardware/interfaces/wifi/1.0/default
Change-Id: I5e65e2fdb5596346bde6963588031dcea42d633a
diff --git a/wifi/1.0/default/failure_reason_util.h b/wifi/1.0/default/failure_reason_util.h
new file mode 100644
index 0000000..d731700
--- /dev/null
+++ b/wifi/1.0/default/failure_reason_util.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef FAILURE_REASON_UTIL_H_
+#define FAILURE_REASON_UTIL_H_
+
+#include <android/hardware/wifi/1.0/IWifi.h>
+#include <hardware_legacy/wifi_hal.h>
+
+namespace android {
+namespace hardware {
+namespace wifi {
+
+std::string LegacyErrorToString(wifi_error error);
+
+V1_0::FailureReason CreateFailureReason(
+    V1_0::CommandFailureReason reason, const std::string& description);
+V1_0::FailureReason CreateFailureReasonLegacyError(
+    wifi_error error, const std::string& description);
+
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android
+
+#endif  // FAILURE_REASON_UTIL_H_