Revert^2 "Move keymint to android.hardware.security."

1ffcdebadd7229af65c575dc1271084b17fe42d7

Bug: 175345910
Bug: 171429297
Exempt-From-Owner-Approval: re-landing topic with no changes in this CL.
Change-Id: I691cad252f188b54a8076589d9955774d74d4729
diff --git a/security/keymint/aidl/default/service.cpp b/security/keymint/aidl/default/service.cpp
new file mode 100644
index 0000000..a710535
--- /dev/null
+++ b/security/keymint/aidl/default/service.cpp
@@ -0,0 +1,45 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "android.hardware.security.keymint-service"
+
+#include <android-base/logging.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+
+#include <AndroidKeyMintDevice.h>
+#include <keymaster/soft_keymaster_logger.h>
+
+using aidl::android::hardware::security::keymint::AndroidKeyMintDevice;
+using aidl::android::hardware::security::keymint::SecurityLevel;
+
+int main() {
+    // Zero threads seems like a useless pool, but below we'll join this thread to it, increasing
+    // the pool size to 1.
+    ABinderProcess_setThreadPoolMaxThreadCount(0);
+    std::shared_ptr<AndroidKeyMintDevice> keyMint =
+            ndk::SharedRefBase::make<AndroidKeyMintDevice>(SecurityLevel::SOFTWARE);
+
+    keymaster::SoftKeymasterLogger logger;
+    const auto instanceName = std::string(AndroidKeyMintDevice::descriptor) + "/default";
+    LOG(INFO) << "instance: " << instanceName;
+    binder_status_t status =
+            AServiceManager_addService(keyMint->asBinder().get(), instanceName.c_str());
+    CHECK(status == STATUS_OK);
+
+    ABinderProcess_joinThreadPool();
+    return EXIT_FAILURE;  // should not reach
+}