Merge "Use libgtest_prod_headers." am: 7749ef2a4a am: fc3c4d6cb4 am: 09df2e2c96 am: b562c5633e

Original change: https://android-review.googlesource.com/c/platform/hardware/libhardware/+/1687225

Change-Id: I49865487dfc5dff94db0223b5b344cfa2a0b809e