[Dagger] Make CustomWidgetManager provided by DaggerSingletonObject

Test: presubmit
Bug: 361850561
Flag: NONE Dagger change
Change-Id: I9c2a9cc12aa2a409e8f9053a059426843f72deed

src/com/android/launcher3/dagger/LauncherBaseAppComponent.java

@@ -22,6 +22,7 @@ import com.android.launcher3.pm.InstallSessionHelper;
 import com.android.launcher3.util.DaggerSingletonTracker;
 import com.android.launcher3.util.ScreenOnTracker;
 import com.android.launcher3.util.SettingsCache;
+import com.android.launcher3.widget.custom.CustomWidgetManager;
 
 import dagger.BindsInstance;
 
@@ -38,6 +39,7 @@ public interface LauncherBaseAppComponent {
     InstallSessionHelper getInstallSessionHelper();
     ScreenOnTracker getScreenOnTracker();
     SettingsCache getSettingsCache();
+    CustomWidgetManager getCustomWidgetManager();
 
     /** Builder for LauncherBaseAppComponent. */
     interface Builder {