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: 09428161 am: 29bc0d33

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



Change-Id: I90efd2e4ebde440463f41a0bc8ac21b90ca5421d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>