Disable the optimization mode preference if the app is not settable am:...

Disable the optimization mode preference if the app is not settable am: 5cd3a729 am: d056edc1 am: 55ef64a3 am: 18deadcf

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/23235859



Change-Id: I5b76a1f4637963405cf3a5333019e29743840c9e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>