[automerger skipped] Merge "Revert "Create exported mode flag library for package android.os""" into main am: cfaaa938b9 -s ours

am skip reason: Merged-In I445d8e8fecc1fead739847c756cfba66a384c978 with SHA-1 d447c13793 is already in history. Merged-In was found from reverted change.

Reverted change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3165262

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3166659

Change-Id: I6a965134eb18ada93582f7bbb47927a49131b5a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>