[Mainline] android.system package APIs migration

By removing Int32Ref.

Bug: 177619520
Bug: 179703584
Test: mma
Change-Id: I9b63146ae563ed977f3112c9910f7a7c575de0b8
Merged-In: I9b63146ae563ed977f3112c9910f7a7c575de0b8
(cherry picked from commit 63be51447826b077a1048901bb1aa73adb321ee1)
2 files changed