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
Fix: 261957150
Test: TH
Merged-In: I0847a189bf945d8aa051133c7cff277a8692272d
Change-Id: I0847a189bf945d8aa051133c7cff277a8692272d
(cherry picked from commit 51a6ae01)