Save has many limitations on compat mode, so we better not change the SaveInfo
behavior but rather document then.
This reverts commit 4f74a018c8.
Test: atest CtsAutoFillServiceTestCases:VirtualContainerActivityTest \
CtsAutoFillServiceTestCases:VirtualContainerActivityCompatModeTest
Bug: 77655074
Change-Id: I36bd28ca546dcedefe75de7815b76b8b5827aee3