Make odsign_e2e_tests in CTS agnostic to ART implementation.

This change adds a new test `verifyArtUpgradeGeneratesAnyArtifacts`,
which checks if there is any file that exists in ART dalvik-cache,
instead of checking particular files. The original test,
`verifyArtUpgradeGeneratesRequiredArtifacts`, is now skipped in CTS.

Bug: 224760042
Test: atest odsign_e2e_tests
Change-Id: Ie26369153efad68fc44b534f13ef0f2315e6f33f
3 files changed