Don't generate a Dagger component for GlobalRootComponent.

Bug: 257631899
Test: manuall built and run
Change-Id: I62e937187b93363711020e86314e15d7d0633c28

packages/SystemUI/src/com/android/systemui/dagger/GlobalRootComponent.java

@@ -21,24 +21,21 @@ import android.content.Context;
 import com.android.systemui.dagger.qualifiers.InstrumentationTest;
 import com.android.systemui.util.InitializationChecker;
 
-import javax.inject.Singleton;
-
 import dagger.BindsInstance;
-import dagger.Component;
 
 /**
  * Base root component for Dagger injection.
  *
+ * This class is not actually annotated as a Dagger component, since it is not used directly as one.
+ * Doing so generates unnecessary code bloat.
+ *
  * See {@link ReferenceGlobalRootComponent} for the one actually used by AOSP.
  */
-@Singleton
-@Component(modules = {GlobalModule.class})
 public interface GlobalRootComponent {
 
     /**
      * Builder for a GlobalRootComponent.
      */
-    @Component.Builder
     interface Builder {
         @BindsInstance
         Builder context(Context context);