Settings: Fix NPE in SliceHalfCardRendererHelper

msg: java.lang.NullPointerException: Attempt to invoke virtual method 'android.graphics.drawable.Drawable androidx.core.graphics.drawable.IconCompat.loadDrawable(android.content.Context)' on a null object reference
stacktrace: java.lang.NullPointerException: Attempt to invoke virtual method 'android.graphics.drawable.Drawable androidx.core.graphics.drawable.IconCompat.loadDrawable(android.content.Context)' on a null object reference
	at com.android.settings.homepage.contextualcards.slices.SliceHalfCardRendererHelper.bindView(SliceHalfCardRendererHelper.java:60)
	at com.android.settings.homepage.contextualcards.slices.SliceContextualCardRenderer.lambda$bindView$0$SliceContextualCardRenderer(SliceContextualCardRenderer.java:140)
	at com.android.settings.homepage.contextualcards.slices.-$$Lambda$SliceContextualCardRenderer$Suc5qG_b2ywDyecCCfO1YnSa0M4.onChanged(Unknown Source:10)
	at androidx.lifecycle.LiveData.considerNotify(LiveData.java:131)
	at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:149)
	at androidx.lifecycle.LiveData.setValue(LiveData.java:307)
	at androidx.lifecycle.LiveData$1.run(LiveData.java:91)
	at android.os.Handler.handleCallback(Handler.java:883)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loop(Looper.java:214)
	at android.app.ActivityThread.main(ActivityThread.java:7356)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:915)

Signed-off-by: Anushek Prasal <anushekprasal@gmail.com>

src/com/android/settings/homepage/contextualcards/slices/SliceHalfCardRendererHelper.java

@@ -57,23 +57,25 @@ void bindView(RecyclerView.ViewHolder holder, ContextualCard card, Slice slice)
         final HalfCardViewHolder view = (HalfCardViewHolder) holder;
         final SliceMetadata sliceMetadata = SliceMetadata.from(mContext, slice);
         final SliceAction primaryAction = sliceMetadata.getPrimaryAction();
-        view.icon.setImageDrawable(primaryAction.getIcon().loadDrawable(mContext));
-        view.title.setText(primaryAction.getTitle());
-        view.content.setOnClickListener(v -> {
-            try {
-                primaryAction.getAction().send();
-            } catch (PendingIntent.CanceledException e) {
-                Log.w(TAG, "Failed to start intent " + primaryAction.getTitle());
-            }
-            final String log = ContextualCardLogUtils.buildCardClickLog(card, 0 /* row */,
-                    EventInfo.ACTION_TYPE_CONTENT, view.getAdapterPosition());
+        if (mContext != null) {
+            view.icon.setImageDrawable(primaryAction.getIcon().loadDrawable(mContext));
+            view.title.setText(primaryAction.getTitle());
+            view.content.setOnClickListener(v -> {
+                try {
+                    primaryAction.getAction().send();
+                } catch (PendingIntent.CanceledException e) {
+                    Log.w(TAG, "Failed to start intent " + primaryAction.getTitle());
+                }
+                final String log = ContextualCardLogUtils.buildCardClickLog(card, 0 /* row */,
+                        EventInfo.ACTION_TYPE_CONTENT, view.getAdapterPosition());
 
-            final MetricsFeatureProvider metricsFeatureProvider =
-                    FeatureFactory.getFactory(mContext).getMetricsFeatureProvider();
+                final MetricsFeatureProvider metricsFeatureProvider =
+                        FeatureFactory.getFactory(mContext).getMetricsFeatureProvider();
 
-            metricsFeatureProvider.action(mContext,
-                    SettingsEnums.ACTION_CONTEXTUAL_CARD_CLICK, log);
-        });
+                metricsFeatureProvider.action(mContext,
+                        SettingsEnums.ACTION_CONTEXTUAL_CARD_CLICK, log);
+            });
+        }
     }
 
     static class HalfCardViewHolder extends RecyclerView.ViewHolder {