WrappedApplicationKey: Remove superfluous branch in deserialization.

The metadata field is written unconditionally and will be represented at
least by a -1 if it is null.

Bug: 210655898
Test: N/A
Change-Id: Iad85dbec916a2d51523b81b594b66b9518811d27

core/java/android/security/keystore/recovery/WrappedApplicationKey.java

@@ -167,10 +167,7 @@ public final class WrappedApplicationKey implements Parcelable {
     protected WrappedApplicationKey(Parcel in) {
         mAlias = in.readString();
         mEncryptedKeyMaterial = in.createByteArray();
-        // Check if there is still data to be read.
-        if (in.dataAvail() > 0) {
-            mMetadata = in.createByteArray();
-        }
+        mMetadata = in.createByteArray();
     }
 
     @Override