Fix vendor situation for selinux_log_callback.

Add a new function selinux_vendor_log_callback to support
    the non-VNDK vendor case (where /system/etc/event-log-tags
    isn't available for consistency of all PRODUCT_FULL_TREBLE
    devices whether they are VNDK or the legacy VNDK).

Bug: 113083310
Test: boot Pixel 1, use new APIs in vndservicemanager, check
      for denials.
Change-Id: I032dbb6e6fb5d9b825feab9dee0de617c055cfe2
4 files changed