keystore: fsync on the directory containing keyblobs
Calls fsync on the directory containing keyblobs to
narrow the window in which keyblob may be lost due to power loss.
CRs-Fixed: 2480750
Change-Id: Ic98ffa9a81208efa761487387f49b08b73e9c3af
Signed-off-by:
Neeraj Soni <neersoni@codeaurora.org>
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