Fixed portrait orientation if fixed_rotation flag

Use SCREEN_ORIENTATION_PORTRAIT for the launcher if the fixed_rotation
is enabled

Test: manual, check that the launcher doesn't rotates when the flag is
enabled and we are coming from a landscape activity
Bug: 147469164
Bug: 146416687
Change-Id: I0fe0d16ec1fbfe096fbdfcf2c315e12fb3423cf8
3 files changed