Add FLAG_IMMUTABLE to PendingIntents am: d94eb4458a am: 3b2c8b7687 am: fbda351eac am: abb6ea3c7f

Original change: https://android-review.googlesource.com/c/platform/packages/apps/SettingsIntelligence/+/2229861

Change-Id: Icbeaa220a4c5e8038e41881199ae15e355647a08
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>