Camera: fix status tracker race condition

Request thread may race with disconnect call when device is
disconnected in error condition. Acquire mLock when camera
device is updating status tracker to prevent that race
(status tracker being freed and then updated).
In other places where status tracker is updated, there is
a promoted sp to guarantee status tracker remain alive during
the call.

Test: CTS, manual camera testing
Bug: 62420820, 65432229
Change-Id: Id894b5d3482c64125c114f79dbe746c56048fcbe
Merged-In: Id894b5d3482c64125c114f79dbe746c56048fcbe