Disable splash screen for launches from widget.

The transition from a widget to the splash screen icon feels
odd because of the difference in shapes. Disable for S and rework that
in T.

Test: Manually tested with clock and Calendar
Bug: 197504657
Change-Id: Ia375885af967d6ad282dcc7325ad905731c8734d
(cherry picked from commit ee44c4dc1ee00e126334a0505b9c95850f3bdc73)
1 file changed