Revert "Promote IgnoredPureGetter and ReturnValueIgnored to errors" This reverts commit d30b1c01f1efb53edb8d6d494b696a2ffeea3a8a. Reason for revert: Droidmonitor created revert due to b/370798491. Will be verifying through ABTD before submission. Change-Id: I5184727151ec9ec81a2cd03826742ee4219c5551