Remove ALOGD_IF_SLOW

ALOGD_IF_SLOW isn't intuitively implemented as it cannot handle
temporaries used as its parameters.  Since there are so few users of
it already and since it's just sugar on top of 2 otherwise trivial
lines, we opt to remove it entirely.

Bug: 62820330
Test: Build
Change-Id: I196443b3717497f6cab31bfaee94a229e4838556