Merge changes I5851dd16,Id196307f into pi-dev

* changes:
  OMS: harden permission checks
  Add missing fields to OverlayInfo.hashCode

core/java/android/content/om/OverlayInfo.java

@@ -261,6 +261,7 @@ public final class OverlayInfo implements Parcelable {
         result = prime * result + state;
         result = prime * result + ((packageName == null) ? 0 : packageName.hashCode());
         result = prime * result + ((targetPackageName == null) ? 0 : targetPackageName.hashCode());
+        result = prime * result + ((category == null) ? 0 : category.hashCode());
         result = prime * result + ((baseCodePath == null) ? 0 : baseCodePath.hashCode());
         return result;
     }

services/core/java/com/android/server/om/OverlayManagerService.java

@@ -680,7 +680,7 @@ public final class OverlayManagerService extends SystemService {
          * @throws SecurityException if the permission check fails
          */
         private void enforceChangeOverlayPackagesPermission(@NonNull final String message) {
-            getContext().enforceCallingOrSelfPermission(
+            getContext().enforceCallingPermission(
                     android.Manifest.permission.CHANGE_OVERLAY_PACKAGES, message);
         }
 
@@ -691,8 +691,7 @@ public final class OverlayManagerService extends SystemService {
          * @throws SecurityException if the permission check fails
          */
         private void enforceDumpPermission(@NonNull final String message) {
-            getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP,
-                    message);
+            getContext().enforceCallingPermission(android.Manifest.permission.DUMP, message);
         }
     };