Merge "Prevent deadlock in RollbackManager#getAvailabeRollbacks" into qt-dev

        }, filter, null, getHandler());

    }

    /**

     * This method posts a blocking call to the handler thread, so it should not be called from

     * that same thread.

     * @throws {@link IllegalStateException} if called from {@link #mHandlerThread}

     */

    @Override

    public ParceledListSlice getAvailableRollbacks() {

        enforceManageRollbacks("getAvailableRollbacks");

        if (Thread.currentThread().equals(mHandlerThread)) {

            Log.wtf(TAG, "Calling getAvailableRollbacks from mHandlerThread "

                    + "causes a deadlock");

            throw new IllegalStateException("Cannot call RollbackManager#getAvailableRollbacks "

                    + "from the handler thread!");

        }

        // Wait for the handler thread to get the list of available rollbacks

        // to get the most up-to-date results. This is intended to reduce test