Use OptionalLong to track enqueue time 06/83006/5
authorRobert Varga <robert.varga@pantheon.tech>
Wed, 10 Jul 2019 14:07:59 +0000 (16:07 +0200)
committerRobert Varga <robert.varga@pantheon.tech>
Wed, 10 Jul 2019 15:37:15 +0000 (17:37 +0200)
This prevents the need to box/unbox primitive longs and makes things
generally more convenient.

Change-Id: I6ca394526b09fdd469a9440c9313371e6185c135
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

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