Reject suggestion modify when device is shutting down

Flag: EXEMPT bugfix
Bug: 349534792
Test: atest com.android.server.wifi
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:2181de2ff34898505ab0f587ac4ea020ffb03996)
Merged-In: Icc201580eb4bdb0c4d064f00df3aa578ffb08068
Change-Id: Icc201580eb4bdb0c4d064f00df3aa578ffb08068
4 files changed