Revert "Remove legacy execmod access."

This reverts commit 0f11ffccf907b000213d76eccb22a84ac73c19e5.

Reason for revert: libmono crashes

Bug: 112292089
Bug: 111544476
Test: policy compiles, device boots
Change-Id: I064090aa9337cf17b80cd2c9af9342df851a3b27
2 files changed