Dont throw an exception for non-system apps when enabling system apps.

In EnableSystemAppWithIntent: if a non-system app matches the intent:
ignore it instead of throwing an exception.

Change-Id: I64dc9a0bbc1a6bc5e2159a33b7273464ed2518c5
diff --git a/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java b/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java
index b8f0d072..05c37d1 100644
--- a/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java
+++ b/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java
@@ -5045,15 +5045,14 @@
                 if (activitiesToEnable != null) {
                     for (ResolveInfo info : activitiesToEnable) {
                         if (info.activityInfo != null) {
-
-                            if (!isSystemApp(pm, info.activityInfo.packageName, primaryUser.id)) {
-                                throw new IllegalArgumentException(
-                                        "Only system apps can be enabled this way.");
+                            String packageName = info.activityInfo.packageName;
+                            if (isSystemApp(pm, packageName, primaryUser.id)) {
+                                numberOfAppsInstalled++;
+                                pm.installExistingPackageAsUser(packageName, userId);
+                            } else {
+                                Slog.d(LOG_TAG, "Not enabling " + packageName + " since is not a"
+                                        + " system app");
                             }
-
-
-                            numberOfAppsInstalled++;
-                            pm.installExistingPackageAsUser(info.activityInfo.packageName, userId);
                         }
                     }
                 }