Merge changes I48eb4966,I32f311a6,Ib82d26ee,Iec9fe858,I43e34237

* changes:
  Fix bug that phone crashes when switching data.
  Fix CBRS DataSwitch sending multiple START events.
  For back to back setPreferredDataCall, send failure on first callback.
  Fix PhoneSwitcherTest flakiness by adding a short wait.
  Switch to SIM with voice call on hold.