FLACExtractor: copy protect mWriteBuffer

Bug: 30895578
Bug: 34970788
Change-Id: I4cba36bbe3502678210e5925181683df9726b431
(cherry picked from commit 328cd66cc72ba7bc5452ed5a93f29ddcd73aa9f9)
(cherry picked from commit 8ee699977c155c6d67e4abd8b4259b5447148a80)
1 file changed