Safely handle the case of BroadcastOptions being null.

BroadcastOptions argument in Context#sendBroadcastMultiplePermissions
API is marked as @Nullable but would result in NPE if a null
BroadcastOptions is passed.

Bug: 264293164
Test: TH
Change-Id: I0847a189bf945d8aa051133c7cff277a8692272d