[SuwLib] Update SwitchItem checked state

Update SwitchItem checked state when the user clicks on the switch.

Bug: 28317915
Change-Id: If3bba280fbab50225990fa96290b8458bd14975f
diff --git a/library/eclair-mr1/src/com/android/setupwizardlib/items/SwitchItem.java b/library/eclair-mr1/src/com/android/setupwizardlib/items/SwitchItem.java
index aaeaf34..bbb2520 100644
--- a/library/eclair-mr1/src/com/android/setupwizardlib/items/SwitchItem.java
+++ b/library/eclair-mr1/src/com/android/setupwizardlib/items/SwitchItem.java
@@ -93,6 +93,7 @@
 
     @Override
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+        mChecked = isChecked;
         if (mListener != null) {
             mListener.onCheckedChange(this, isChecked);
         }