Merge "Validate AttributionSource during unparceling." into sc-dev am: fee338118c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15275356

Change-Id: I053ab02c3c3d8741c3ecdb0ef6260643ddaaa1b7

core/java/android/content/AttributionSource.java

@@ -152,6 +152,10 @@ public final class AttributionSource implements Parcelable {
 
     AttributionSource(@NonNull Parcel in) {
         this(AttributionSourceState.CREATOR.createFromParcel(in));
+
+        // Since we just unpacked this object as part of it transiting a Binder
+        // call, this is the perfect time to enforce that its UID can be trusted
+        enforceCallingUid();
     }
 
     /** @hide */