Update datagram transfer states internally first and then send updates

to clients.

Bug: 275670811
Test: atest DatagramDispatcherTest,
      atest DatagramReceiverTest
      atest CtsTelephonyTestCases:android.telephony.satellite.cts
      Flashed build on raven-userdebug: calls and sms are working

Change-Id: I5dc5df43663299580a35e7517b19b44fa24332d3