Merge "Remove ndk_platform backend. Use the ndk backend." into sc-dev-plus-aosp am: 21bf757c99 am: 478cad842a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15472407

Change-Id: I74e465f157c4777f9324a6bb5cfe9d7bc3d2017c