Restore the creation of the remote context in sync inflation.

This was mistakenly removed in Android S (in ag/13732454) and could
cause issues if the top-level layout parameters are defined using
resources defined in the AppWidget's package.

Also add some safeguard to avoid crashing if the AppWidgetProviderInfo
doesn't contain a ProviderInfo (which can happen if it's not created by
the system).

Fix: 201744899
Test: Existing CTS tests
Change-Id: Ibb4f2c26a6258ec2c68a7fd1fafe3e5fe3551109

core/java/android/appwidget/AppWidgetHostView.java

@@ -552,6 +552,10 @@ public class AppWidgetHostView extends FrameLayout {
                 inflateAsync(rvToApply);
                 return;
             }
+            // Prepare a local reference to the remote Context so we're ready to
+            // inflate any requested LayoutParams.
+            mRemoteContext = getRemoteContext();
+
             int layoutId = rvToApply.getLayoutId();
             if (rvToApply.canRecycleView(mView)) {
                 try {
@@ -727,6 +731,9 @@ public class AppWidgetHostView extends FrameLayout {
         } catch (NameNotFoundException e) {
             Log.e(TAG, "Package name " +  mInfo.providerInfo.packageName + " not found");
             return mContext;
+        } catch (NullPointerException e) {
+            Log.e(TAG, "Error trying to create the remote context.", e);
+            return mContext;
         }
     }