Import platform SDK from build 7304504

prebuilts/sdk/update_prebuilts.py -p 7304504

Mainly for updating IKE API stubs so that non-updatable APIs
can reference new IKE API classes

Bug: 186071626
Test: make update-api && make
Change-Id: I7ea88df93caf84a0f10caedf73ed208da701f0d3
Merged-In: I481e69af84273d1573e6bbeb5a675b16ec90bb8d
Merged-In: Ic3ea045e371c5fa0f5b8ddd445a194311fe0dc35
31 files changed