Removing fullscreen launch for translucent split

After b/192572357 is merged there is no need to run
testTranslucentOnSplitSecondaryTask first activity on fullscreen.
This is also to monitor lifecycle errors that happen in the lab but
are not reproducible locally.

Bug: 189992767
Test: atest ActivityLifecycleLegacySplitScreenTests#testTranslucentOnSplitSecondaryTask
Change-Id: I5731ae6ebb8458b62284955e96e37d7c4d2360d2
1 file changed