Merge "libmediautils: pin cpp_std to gnu++17" into main am: bd55f8b8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2833039



Change-Id: I532cab180b627a8ac8c9c9b8b50dc40332124c03
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>