Add fallback when EJ scheduling fails. am: 8d7e5fecbe

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/providers/CalendarProvider/+/23476484

Change-Id: Ie09ae6fef780cc8644b326cbe03ba844232f32f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>