Merge "[SF] Use nodiscard instead of clang::warn_unused_result" into tm-dev am: 5364e036 am: 1a79fa43

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/17225602

Change-Id: I65d56b16990c7243f412b3aec92c4539141500ea