Revert "Create exported mode flag library for package android.os""

This reverts commit e8b6adbd5317f565ebb3907967c63a88c32ef340.

Reason for revert: <Droidmonitor created revert due to b/352479110. Will be verifying through ABTD before submission.>

Change-Id: Ifaa15f62310189f4d123f294e4b7e991b05959a3
2 files changed