Remove some logging and unminimizeTask call from DesktopRepo

Before this CL when adding launching a single task in desktop mode we
log tens of lines to logcat. With this CL we remove some unnecessary
logs (implied from other logs) and an unnecessary call to
unminimizeTask().

Bug: 402376113
Test: DesktopRepositoryTest
Flag: EXEMPT - log fixes
Change-Id: Id48dea4140df479084a3cc7f9296a58d1eefdaf7