Revert^2 "Add GnssAntennaInfo to HAL"

ce414351c5d42f5084ff7015b255587b3c384fca

Change-Id: I791dcf8c26f3ed51c07987e79752ff3ce165fcbf
diff --git a/gnss/2.1/IGnssAntennaInfo.hal b/gnss/2.1/IGnssAntennaInfo.hal
new file mode 100644
index 0000000..f77d874
--- /dev/null
+++ b/gnss/2.1/IGnssAntennaInfo.hal
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 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.gnss@2.1;
+
+import IGnssAntennaInfoCallback;
+
+/**
+ * Extended interface for GNSS antenna information support.
+ */
+interface IGnssAntennaInfo {
+    enum GnssAntennaInfoStatus : int32_t {
+        SUCCESS = 0,
+        ERROR_ALREADY_INIT = -100,
+        ERROR_GENERIC = -101,
+    };
+
+    /**
+     * Registers the callback routines with the HAL.
+     *
+     * @param callback Handle to the GnssAntennaInfo callback interface.
+     */
+    setCallback(IGnssAntennaInfoCallback callback) generates (GnssAntennaInfoStatus initRet);
+
+    /**
+     * Stops updates from the HAL, and unregisters the callback routines.
+     * After a call to close(), the previously registered callbacks must be
+     * considered invalid by the HAL.
+     * If close() is invoked without a previous setCallback, this function must perform
+     * no work.
+     */
+    close();
+};