Clean up 18681396b08e01c355f137dfe3ced15c4dd71707.

This is a follow-up to 18681396b08e01c355f137dfe3ced15c4dd71707, which
ensures that the modified assertions provide more useful information
when they fail. 18681396b08e01c355f137dfe3ced15c4dd71707 switched some
asertions about authorized digests and paddings sets to only report
the first missing element. This CL reverts the behavior back to
reporting the expected and actual sets in full, which should help
troubleshoot issues when they arise.

Bug: 22529223
Change-Id: Ib95cafd45bc0bd9bdc9213eb2e65260304844b8f
2 files changed