Add a default implementation for fastboot HAL.

Bug: 124727766
Test: fastboot getvar variant, fastboot getvar off-mode-charge,
fastboot oem cmd, fastboot getvar soc-voltage-ok,
fastboot getvar partition-type:userdata

Change-Id: I936e02dbfdf0066db8817a9ade9164dd4c96781f
diff --git a/fastboot/1.0/default/Fastboot.h b/fastboot/1.0/default/Fastboot.h
new file mode 100644
index 0000000..3127059
--- /dev/null
+++ b/fastboot/1.0/default/Fastboot.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 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.
+ */
+#pragma once
+
+#include <android/hardware/fastboot/1.0/IFastboot.h>
+#include <hidl/Status.h>
+
+namespace android {
+namespace hardware {
+namespace fastboot {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::hardware::hidl_string;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct Fastboot : public IFastboot {
+    // Methods from ::android::hardware::fastboot::V1_0::IFastboot follow.
+    Return<void> getPartitionType(const hidl_string& partitionName,
+                                  getPartitionType_cb _hidl_cb) override;
+    Return<void> doOemCommand(const hidl_string& oemCmd, doOemCommand_cb _hidl_cb) override;
+    Return<void> getVariant(getVariant_cb _hidl_cb) override;
+    Return<void> getOffModeChargeState(getOffModeChargeState_cb _hidl_cb) override;
+    Return<void> getBatteryVoltageFlashingThreshold(
+            getBatteryVoltageFlashingThreshold_cb _hidl_cb) override;
+};
+
+extern "C" IFastboot* HIDL_FETCH_IFastboot(const char* name);
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace fastboot
+}  // namespace hardware
+}  // namespace android