Update NDK prebuilts to build 8474149. am: ee71351fae am: 3313fbb9d1

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

Change-Id: Ida119d0b0312e28142301c4d27c276faeb4a3935
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>