Regsiter BT HAL services if they are declared

Since finder/ranging/lmp_event HAL services are new and their interfaces
are not frozen yet, they can't register services in -next-
configuration.

Bug: 322204309
Bug: 319155748
Test: run CF in -next- build
Change-Id: I4729d8763842c719682ce0124bbaaed86164a7d5
diff --git a/bluetooth/finder/aidl/default/service.cpp b/bluetooth/finder/aidl/default/service.cpp
index a117df8..fe8904b 100644
--- a/bluetooth/finder/aidl/default/service.cpp
+++ b/bluetooth/finder/aidl/default/service.cpp
@@ -35,12 +35,16 @@
       ndk::SharedRefBase::make<BluetoothFinder>();
   std::string instance =
       std::string() + BluetoothFinder::descriptor + "/default";
-  auto result =
-      AServiceManager_addService(service->asBinder().get(), instance.c_str());
-  if (result == STATUS_OK) {
-    ABinderProcess_joinThreadPool();
+  if (AServiceManager_isDeclared(instance.c_str())) {
+    auto result =
+        AServiceManager_addService(service->asBinder().get(), instance.c_str());
+    if (result != STATUS_OK) {
+      ALOGE("Could not register as a service!");
+    }
   } else {
-    ALOGE("Could not register as a service!");
+    ALOGE("Could not register as a service because it's not declared.");
   }
+  // Keep running
+  ABinderProcess_joinThreadPool();
   return 0;
 }