fb: after fixing the root cause remove implemented lock

    after the root cause of the before triggered problems on
    recreation was fixed with this commit

    https://github.com/SlimRoms/frameworks_base/commit/36b309f4ecc38fdd0a06bac7cfd67965b3f1f447

    we can roll back the lock changes we did which had as well some unwanted
    side effects.

    Change-Id: I138068ffe0a688cef6cc0bdbe2b581b492e0b795

Change-Id: I6bd23b56a1f5e274749a7996e987c5c0fabf2aba