System context should inherit base package name.

Otherwise registerReceiver() from views inflated with the returned
context will throw (like DateTimeView).

Bug: 6376149
Change-Id: I038a680e49fba81bbebfc8c0c94f15e7cd072f33

Author: jsharkey

core/java/android/app/ContextImpl.java

@@ -1480,7 +1480,9 @@ public void enforceUriPermission(
     public Context createPackageContext(String packageName, int flags)
         throws PackageManager.NameNotFoundException {
         if (packageName.equals("system") || packageName.equals("android")) {
-            return new ContextImpl(mMainThread.getSystemContext());
+            final ContextImpl context = new ContextImpl(mMainThread.getSystemContext());
+            context.mBasePackageName = mBasePackageName;
+            return context;
         }
 
         LoadedApk pi =