binder_parcel_fuzzer: add read* for std::optional

These methods were added because AIDL uses std::optional for nullable
types for C++ backends.

Bug: 142543448
Bug: 144773267 (std::optional for nullable)
Test: run binder_parcel_fuzzer for a few minutes
Change-Id: Iab70283382045771741b8370932c6265aa058ec9
Merged-In: Iab70283382045771741b8370932c6265aa058ec9
1 file changed