Use public android.system.Int64Ref instead of Int32Ref which is hidden (CorePlatformApi) type of am: 3f22cb1106

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1582887

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iab4679528ce95ee246b6f2ff0dd0038b6e6a4b35