Merge "mediatranscoding: pin cpp_std to gnu++17" into main am: c396e061 am: 80e81aea

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2833038



Change-Id: Iad6d065de1d3036894e277ef9342d720fa3c70ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>