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

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

Change-Id: I78b00a1e117e3fbac9213134e9810dacc7aa1b3a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>