Add mechanism for Parcel to not allow FDs to be written to it.

This is to help implement issue #5224703.

Change-Id: I026a5890495537d15b57fe61227a640aac806d46
diff --git a/core/java/android/os/Parcel.java b/core/java/android/os/Parcel.java
index e9ed676..36a08b9 100644
--- a/core/java/android/os/Parcel.java
+++ b/core/java/android/os/Parcel.java
@@ -323,6 +323,9 @@
      */
     public final native void setDataCapacity(int size);
 
+    /** @hide */
+    public final native boolean setAllowFds(boolean allowFds);
+
     /**
      * Returns the raw bytes of the parcel.
      *