ProfileSelectDialog no longer removes caller activity from task.

In Settings, after calling ProfileSelectDialog and choosing a profile,
then going back would go 2 activities back. The issue is that
ProfileSelectDialog was calling finish() in the no-longer-used
SettingsDrawerActivity. This caused the any activity calling the
dialog to be removed from the task, and thus being impossible to
go back to. This call to the drawer is also a code smell.

Bug: 36237246
Fixes: 36237246
Test: NA
Change-Id: I6f309b220ffae1d86e6879ddf6a0305ad3dde3e8