Add fallback when EJ scheduling fails. am: 8d7e5fecbe

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

Change-Id: I0a94412e1f41b3635bf67ccb74687cc97beea6d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>