Merge "Adding Message and Serialization fuzzers to libpdx" am: 533d368808 am: bd9017b97d am: 4d2885bcb3

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1356582

Change-Id: Iad321cf29564210f1fe72093ddf7f6310528da79