Add product_available to product available modules am: 0277545b5d am: 5f5a000464 am: 0a904f94b5

Original change: https://android-review.googlesource.com/c/platform/external/libunwind/+/1495996

Change-Id: I6b1c73a2a6331b65ef27d03534b3a70f1ceb2869