Use a simple Thread instead of executor service

Author: romtsn

sentry-android-core/src/main/java/io/sentry/android/core/internal/modules/AssetsModulesLoader.java

@@ -10,8 +10,6 @@
 import java.io.InputStream;
 import java.util.Map;
 import java.util.TreeMap;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
@@ -25,10 +23,8 @@ public AssetsModulesLoader(final @NotNull Context context, final @NotNull ILogge
     this.context = ContextUtils.getApplicationContext(context);
 
     // pre-load modules on a bg thread to avoid doing so on the main thread in case of a crash/error
-    final @NotNull ExecutorService executorService = Executors.newSingleThreadExecutor();
     //noinspection Convert2MethodRef
-    executorService.submit(() -> getOrLoadModules());
-    executorService.shutdown();
+    new Thread(() -> getOrLoadModules()).start();
   }
 
   @Override