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For all parameterized Storage tests added a new dimension:
encryption enabled/disabled - now the same
opening/writing/reading/reopending is tested with and without encryption.
Fixed few minor mistakes, found with the test.

Bug:b:170054326

Change-Id: I72df7e96b7163a5b1f7a3f43553b11ac73c15472
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587505
Commit-Queue: Leonid Baraz <lbaraz@chromium.org>
Reviewed-by: Zach Trudo <zatrudo@google.com>
Cr-Commit-Position: refs/heads/master@{#837717}