Import platform SDK from build 7432250

./update_prebuilts.py -f 31 7432250

Bug: 171506470
Test: m checkapi
Merged-In: Ic3ea045e371c5fa0f5b8ddd445a194311fe0dc35
Change-Id: I27941b473ebf30ad8bdeaf9e0ad33fddb6417ec6
92 files changed