Revert "SharedMemory: clear file descriptor when explicitly closed."
Bug: 138422309

This reverts commit 20ab1e34273aa179053f5dc93e70c0191a39e91b.

Reason for revert: crashes documented in b/138422309

Change-Id: Ic9e33fdb24bad2b30f0eb357d6752c1834df41d5
(cherry picked from commit 5966196515ec44190386d9966da3f762859b7b78)
1 file changed