bluetooth: convert to apex

* Use device as an identifier in package names so APEXs on rpi4/rpi5 trees
  can co-exist. Somehow apex definitions escape the soong namespace. It
  doesn't complain about duplicate package names but dependecies later in
  the build after analyzing Android.bp files and generating ninja file.
  FAILED: ninja: ... multiple rules generate com.android.hardware.bluetooth.rpi-deps-info [-w dupbuild=err]
  https://android.googlesource.com/platform/build/soong/+/refs/heads/main/README.md#namespaces
* Not sure if this is an AOSP bug or intended behaviour for apex targets.
  Don't like using the rpi4/rpi5 tags but couldn't come up with better
  solution to limit the visibility that worked.
* General cleanups. As APEX package contains all dependencies that are
  needed for the service, remove unused shared libraries.
  Run 'bpfmt -s -w Android.bp'.

bluetooth/main.cpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ * Copyright (C) 2024 KonstaKANG
+ *
+ * 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.
+ */
+
+#include "BluetoothHci.h"
+
+#include <android-base/logging.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+
+using ::aidl::android::hardware::bluetooth::impl::BluetoothHci;
+
+int main() {
+    ABinderProcess_setThreadPoolMaxThreadCount(0);
+    std::shared_ptr<BluetoothHci> bluetooth = ndk::SharedRefBase::make<BluetoothHci>();
+
+    const std::string instance = std::string() + BluetoothHci::descriptor + "/default";
+    binder_status_t status = AServiceManager_addService(bluetooth->asBinder().get(), instance.c_str());
+    CHECK(status == STATUS_OK);
+
+    ABinderProcess_joinThreadPool();
+    return EXIT_FAILURE;  // should not reach
+}