Fix depfile output from dexpreopt strip script

strip.sh uses $2.d to write the depfile, while this had been passing in
$@.tmp in as $2. Instead, move the file first, then use strip.sh with
the real output file so that we can find the depfile.

Also don't specify a depfile (or other dependencies) when
LOCAL_CERTIFICATE==PRESIGNED, as we'll skip all of that in the rule in
that case.

Bug: 121058584
Test: NINJA_ARGS="-w missingdepfile=true" m
Change-Id: I1323e775e3a6ce5a06a19d59f3fb07495f116f34