java: config: Refactor waitAndGetSystemService()

- Make use of waitForService() for >= Android 11.
- Reserve manual polling for Android 10 due to lack of waitForService().
- Rework on logs to be less cluttering.

Signed-off-by: Dakkshesh <beakthoven@gmail.com>

stub/src/main/java/android/os/ServiceManager.java

@@ -7,18 +7,22 @@ package android.os;
 
 public class ServiceManager {
     public static IBinder getService(String name) {
-        throw new UnsupportedOperationException("STUB!");
+        throw new UnsupportedOperationException("");
+    }
+
+    public static IBinder waitForService(String name) {
+        throw new UnsupportedOperationException("");
     }
 
     public static void addService(String name, IBinder binder) {
-        throw new UnsupportedOperationException("STUB!");
+        throw new UnsupportedOperationException("");
     }
 
     public static IBinder checkService(String name) {
-        throw new UnsupportedOperationException("STUB!");
+        throw new UnsupportedOperationException("");
     }
 
     public static String[] listServices() {
-        throw new UnsupportedOperationException("STUB!");
+        throw new UnsupportedOperationException("");
     }
 }