Add fixed_rotation_transform to home settings

This sets the feature flag on launcher side
and also updates the setting in Settings.Global
Launcher DOES NOT listen to the Settings.Global
change from adb anymore. This should take
preference over setting it from command line.

Also fix a related swipe to home animation bug
that happened w/ merge conflict.

Fixes: 150260456
Test: Set and unset, visually verified behavior.
Tested w/ autorotate on and off.
Checked Settings.Global value correctly updated
via "adb shell settings get global
fixed_rotation_transform"
TODO: Update tests to reflect this new
default-on fixed rotation behavior.

Change-Id: Id95f006eb1e92a59e24b05567298fd21b1409b13