Consider whitelist when listing class members.

Previously, only the enforcement policy was considered when getting
declared fields or members, meaning whitelisted APIs would still not be
discoverable. Fix this by calling hiddenapi::GetMemberAction from within
IsDiscoverable.

Bug: 77787686
Bug: 64382372
Test: cts/tests/signature/runSignatureTests.sh (with ag/3863796)
Test: art/test.py --host -t 674-hiddenapi
Change-Id: I234d274f47f377e3e105c81aae2d49072287992a
4 files changed