User correct category for finding headless sync adapters

bug:22857409

Change-Id: Icc42f1af72c59fba3c60e1bcd558c621df70940a

services/core/java/com/android/server/pm/DefaultPermissionGrantPolicy.java

@@ -662,7 +662,7 @@ final class DefaultPermissionGrantPolicy {
         List<PackageParser.Package> syncAdapterPackages = new ArrayList<>();
 
         Intent homeIntent = new Intent(Intent.ACTION_MAIN);
-        homeIntent.addCategory(Intent.CATEGORY_HOME);
+        homeIntent.addCategory(Intent.CATEGORY_LAUNCHER);
 
         for (String syncAdapterPackageName : syncAdapterPackageNames) {
             homeIntent.setPackage(syncAdapterPackageName);