Change the default behavior when MCC/MNC changes.

By default, we don't restart the activity when MCC/MNC changes
even when they are not set in configChanges. If they want to
restart, set mcc or mnc in the new attribute restartOnConfigChanges.

Bug: 34258948
Test: Test in unit test(testGetActivityConfigChanges() in
      PackageParserTest.java) and on real device with
      changing the SIM card.

Change-Id: Icd6899597c9b8f2e5706e74373a0280d19150092