Update guidelines for API changes in beta to allow P0/P1 exceptions
Update guidelines for API changes in beta to allow P0/P1 exceptions

PiperOrigin-RevId: 356983290
Change-Id: If196b896681b529bd53f7182c25c813bcc6002a1

androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx