Attempt to de-flake tests.

Some of these tests rely on audit logs being generated and then
visible when we try to read them. Occasionally this doesn't work -
probably because of throttling or the asynchronous, background nature
of logging. When it happens the tests fail.

To avoid this, re-run the susceptible tests multiple times rather than
failing on the first go, with increasingly long delays between
triggering and reading the logs on each run.

Bug: 123507824
Test: atest -p services/core/java/com/android/server/pm/dex
Change-Id: I62db997c912b2d153ecaea34011529c4c58207c7