[Mainline] android.system package APIs migration

By removing Int32Ref.

Bug: 177619520
Bug: 179703584
Test: mma
Change-Id: I934bcdf0dc81b03116fc674901c0a01886a29ef3
Merged-In: I934bcdf0dc81b03116fc674901c0a01886a29ef3
(cherry picked from commit b45c914416207497703ea2797084e41746924ef5)
10 files changed