Fixing MainThreadInitializedObject

> Making SafeCloseable implementation mandatory, to prevent leaks during test and preview
> Removing getNoCreate method and defining executeIfCreated to avoid null pointer exceptions
> Fixing sandbox value leaking into main, by Checking sandbox against App context
> Converting sanbox to an interface instead a class

Bug: 335280439
Test: Presubmit
Flag: None
Change-Id: I951dcde871898e745ff6490a1c4f8fd1512888f5

go/quickstep/src/com/android/launcher3/model/AppShareabilityManager.java

@@ -35,6 +35,7 @@ import androidx.room.Room;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.launcher3.model.AppShareabilityDatabase.ShareabilityDao;
 import com.android.launcher3.util.MainThreadInitializedObject;
+import com.android.launcher3.util.SafeCloseable;
 
 import java.lang.annotation.Retention;
 import java.util.ArrayList;
@@ -47,7 +48,7 @@ import java.util.function.Consumer;
  * Each app's status is retrieved from the Play Store's API. Statuses are cached in order
  * to limit extraneous calls to that API (which can be time-consuming).
  */
-public class AppShareabilityManager {
+public class AppShareabilityManager implements SafeCloseable {
     @Retention(SOURCE)
     @IntDef({
         ShareabilityStatus.UNKNOWN,
@@ -194,6 +195,11 @@ public class AppShareabilityManager {
         }
     }
 
+    @Override
+    public void close() {
+        mDatabase.close();
+    }
+
     /**
      * Provides a testable instance of this class
      * This instance allows database queries on the main thread