Revert "ART: Disable sanitization for sigchainlib"

This reverts commit 89b85843049043bfa82942e48f32ec80da73090d.

Reason for revert: All users have moved to Soong

Bug: 38456126
Change-Id: Ia2fb76ecf6cbb65231623602c722d1ad7b671ab1
Test: m
1 file changed