Use canSendBroadcast instead of enforceAllowedToSendBroadcast

Use canSendBroadcast to check if broadcast can be sent from sandbox
process which returns a boolean and lets ActivityManagerService handle
the denial of access before throwing an error

Bug: b/266069576

Test: atest SdkSandboxRestrictionsTest#testSendBroadcastsRestrictions_withAction
atest SdkSandboxRestrictionsTest#testSendBroadcastRestrictions_withoutAction

Change-Id: I846dcc733d498095460a28904e953245e65e5a68