Merge "Use libgtest_prod_headers." am: 7749ef2a4a am: fc3c4d6cb4 am: 09df2e2c96 am: b562c5633e am: c18a6f26cc

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

Change-Id: I8dff5369fd0263ba068be33bf2e15eff6d3c391c