Update NDK prebuilts to build 8474149. am: ee71351fae

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/ndk/+/17947822

Change-Id: I489cd2c48ceea250cf74af096efde23551fc8190
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>