Update Parcel readLazyValue to ignore negative object lengths

Addresses a security vulnerability where a (-8) length object would
cause dataPosition to be reset back to the statt of the value, and be
re-read again.

Bug: 240138294
Test: atest ParcelTest BundleTest AmbiguousBundlesTest
Test: manually ran PoC
Change-Id: I1ab1df6f2a802d8cdf02c89c12959b09d7b1a5c4

core/java/android/os/Parcel.java

@@ -4416,6 +4416,9 @@ public final class Parcel {
         int type = readInt();
         if (isLengthPrefixed(type)) {
             int objectLength = readInt();
+            if (objectLength < 0) {
+                return null;
+            }
             int end = MathUtils.addOrThrow(dataPosition(), objectLength);
             int valueLength = end - start;
             setDataPosition(end);