NativeTombstoneManager: fix tombstone parsing.

For unclear reasons, this was silently succeeding on AOSP, and throwing
a ProtoParseException on internal.

Bug: http://b/159164105
Test: `adb shell crasher` on sc-vf-dev, sc-dev
Change-Id: I605e9db49e344bd57a4e33d32808ca2b5b6f4231

services/core/java/com/android/server/os/NativeTombstoneManager.java

@@ -425,7 +425,7 @@ public final class NativeTombstoneManager {
                                 }
                             }
                             stream.end(token);
-
+                            break;
 
                         case (int) Tombstone.SELINUX_LABEL:
                             selinuxLabel = stream.readString(Tombstone.SELINUX_LABEL);