Revert "Always set FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE on SaveInfo when on compat mode."

Save has many limitations on compat mode, so we better not change the SaveInfo
behavior but rather document then.

This reverts commit 4f74a018.

Test: atest CtsAutoFillServiceTestCases:VirtualContainerActivityTest \
CtsAutoFillServiceTestCases:VirtualContainerActivityCompatModeTest

Bug: 77655074

Change-Id: I36bd28ca546dcedefe75de7815b76b8b5827aee3