Reset last sync when reinitializing gtask acct

app/src/main/java/com/todoroo/astrid/gtasks/auth/GtasksLoginActivity.java

@@ -70,6 +70,7 @@ public class GtasksLoginActivity extends InjectingAppCompatActivity {
             } else {
               account.setError("");
               googleTaskListDao.update(account);
+              googleTaskListDao.resetLastSync(accountName);
             }
             setResult(RESULT_OK);
             DialogUtilities.dismissDialog(GtasksLoginActivity.this, pd);

app/src/main/java/org/tasks/data/GoogleTaskListDao.java

@@ -40,6 +40,9 @@ public abstract class GoogleTaskListDao {
   @Query("SELECT * FROM google_task_lists")
   public abstract List<GoogleTaskList> getAllLists();
 
+  @Query("UPDATE google_task_lists SET last_sync = 0 WHERE account = :account")
+  public abstract void resetLastSync(String account);
+
   @Insert(onConflict = OnConflictStrategy.REPLACE)
   public abstract long insertOrReplace(GoogleTaskList googleTaskList);