Add CompOS to odsign_e2e_tests

Output of CompOS should pass the same verification for the early boot
compilation.  Some test cases are currently ignored due to the known
issues.

The implementation extracts the post-boot verification tests into a new
test class. Since I couldn't find another way to include a test class
(given BaseHostJUnit4Test and DeviceJUnit4ClassRunner), I can only make
it work as a base class (not SuiteClasses;
DeviceJUnit4ClassRunnerWithParameters might work but would be more
complicated).

The new test coverage would have prevent b/216618545.

However, the VM currently fails to boot on user build (b/216321149), so
it's excluded with an assumption.

Bug: 213573626
Test: adb root; atest odsign_e2e_tests
Test: flash -user build; atest odsign_e2e_tests
Change-Id: I54b33742a936329ad0d593b3f623b8a35c2ba627
5 files changed