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

src/com/android/launcher3/PagedView.java

@@ -72,8 +72,6 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
     private static final String TAG = "PagedView";
     private static final boolean DEBUG = false;
 
-    public static boolean sFlagForcedRotation = false;
-
     public static final int INVALID_PAGE = -1;
     protected static final ComputePageScrollsLogic SIMPLE_SCROLL_LOGIC = (v) -> v.getVisibility() != GONE;
 
@@ -199,8 +197,6 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
         if (Utilities.ATLEAST_OREO) {
             setDefaultFocusHighlightEnabled(false);
         }
-
-        sFlagForcedRotation = Utilities.isForcedRotation(context);
     }
 
     protected void setDefaultInterpolator(Interpolator interpolator) {