Exclude embedded activities from updateHomeProcess

When the -1 activity is embedded in the home task, we should not update
the home process to be the -1 activity. We perform this check by
comparing the package name of the Task base intent and the activity.

Bug: 293789001
Test: atest ActivityRecordTests TaskTests ActivityTaskSupervisorTests
Change-Id: Ia097766ef6ea87407ae18b6fe67b8fe1a13431f0