Ender pearls are listed as a feature within the Google Play update log.
I don't believe it could be considered a duplicate of MCPE-8777 as the bug was reported from a time when the creative inventory was not yet fully implemented. Also, the inventory was cleared in changing from survival to creative in MCPE-8777, while this states that the inventory is cleared in changing from survival to creative. Further, the inventory does not get cleared when switching from survival to creative.
I do agree with you on the ender pearls. But, the fact that the update log says "NEW achievements" probably implies that the achievements are not for mobile devices, but are instead added achievements for the Windows 10 Edition.