Fix SF security vulnerability: 32706020

Because of lack of mutex lock when get mConsumerName, if one thread
getConsumerName, another thread setConsumerName frequently, an UAF will
be triggered.

Test: Marling with poc provided in bug report.
Bug: 32706020

FPIIM-178: Elevation of privilege vulnerability in Mediaserver CVE-2017-0415 A-32706020

(cherry picked from commit d073eb7a3f28fd74bfa24c8b7599465cb7de5436)
Change-Id: Id1bbf0d15de6d16def2f54ecade385058cda3b65
(cherry picked from commit fb2412c4a57dc93ed9f7ffedc4fa2d3117dcf201)
1 file changed