Fix compilation with updated googletest Newer verisons of googletest define the macro, so check that it's not defined first. Once googletest is uprev'ed the TODO and #define can be removed. BUG=b:269182434 TEST=CQ passes Change-Id: I87be35facfa1d78896ee8987aee53110e28aeaf8 Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/hardware/interfaces/neuralnetworks/+/4322206 Reviewed-by: Jim Pollock <[email protected]> Tested-by: Tom Hughes <[email protected]> Commit-Queue: Tom Hughes <[email protected]>