Revert^2: "ART: Restrict some checks in the verifier to P+"

Reinstate old behavior for apps targeting earlier releases.

This reverts commit 5ff2596da427351308992a1677348e460a398591.

Bug: 111969862
Bug: 113863780
Test: m test-art-host
Test: cts-tradefed run commandAndExit cts --m vm-tests-tf
Change-Id: I4fd967271cf43e21af34739a08907a1a7953539a