Import platform SDK from build 6318433 am: e4a04150b1 am: efe654b872 am: aacc1598fe

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/sdk/+/10806533

Change-Id: I19b436090c1108783045bddfc0c1ee13bf7e5d3d