Revert "Changing initial and default focus behavior"

This is a soft revert.

This reverts commit 37df2dbab1

Change-Id: I7ac08c0ef514f7ce7a0b750e501a5333f4ffb6d2

core/java/android/view/ViewRootImpl.java

@@ -463,7 +463,7 @@ public final class ViewRootImpl implements ViewParent,
         mDisplayManager = (DisplayManager)context.getSystemService(Context.DISPLAY_SERVICE);
 
         if (!sCompatibilityDone) {
-            sAlwaysAssignFocus = mTargetSdkVersion < Build.VERSION_CODES.O;
+            sAlwaysAssignFocus = true;
 
             sCompatibilityDone = true;
         }