Merge "Expose UpdateEngine.triggerPostinstall to modules." into main am: e34e8dd523 am: ebebe23983

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3336594

Change-Id: I1e136501406250dc17a1269287805752162418fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>