Add new helper APIs to binder_parcel_fuzzer am: 2a2dd3bce2 am: a6c8f4dfab am: f3aa12aea0 am: e49db53abc am: e4da12aa73

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1858833

Change-Id: Iad11b2825b4ca8d1ce2069330f62e8d20da164a5