Set FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE on compat mode test.

This change was accidentaly left away from a a previous reverting CL.

Test: atest CtsAutoFillServiceTestCases:VirtualContainerActivityCompatModeTest
Bug: 77655074

Change-Id: I8cc9947d13b5c1a563a3455200ee208d051719a7
1 file changed