Import platform SDK from build 7637608

./update_prebuilts.py -f 31 7637608

BUG: 195608856
Test: TH
Change-Id: Ib2ba68a9ea5b4f31bd01a1f25c2307f5b946071f
Merged-In: I6f82934cdcf08d4db5b8b639386fded75bdb0e38
(cherry picked from commit 0f6c8a368d5238ac5ac5c87c6c0d153417a74682)
12 files changed