Split odsign_e2e_tests.

This change splits odsign_e2e_tests into OnDeviceSigningHostTest and
OdrefreshHostTest, where the former one checks if odrefresh, odsign,
fs-verity, and ART runtime work together properly, while the latter one
checks end-to-end odrefresh invocations, but without odsign, fs-verity,
and ART runtime involved.

Bug: 199114301
Test: atest odsign_e2e_tests
Change-Id: I93aeefa2e75815e8aab84159ed5b4120cc7124f3
3 files changed