Symbolic constants for older minijails

Inline definitions of a few constants that don't appear on Q/R devices,
so that this works for us in mainline modules that are loaded on those
older devices.

Bug: 225406881
Test: boot on Q, watch logcat
Test: boot on R, watch logcat
Change-Id: Ic5781976d4c1e2d16e230c015fc49d9fde74e289