Init MemoryIntArray#mFd with -1

Symptom:
mFd was left uninitialized when constructor was failed.
As a result, it tried to close mFd=0 at finalize and
it crashed with SIGABRT.

Bug: 35791084

Change-Id: I913975ce3e8524a4e323f948621509e4655de17b
1 file changed