Merge "Adding Message and Serialization fuzzers to libpdx" am: 533d368808 am: bd9017b97d am: 4d2885bcb3 am: cfeeece168

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

Change-Id: Id64bd60e7dfdcaafa5194a489601fa4081a60ff2