libbinder: Parcel APIs for fixed-size arrays

readFixedArray/writeFixedArray for std::array<T,N> are added to Parcel
class. These recursively calls readData/writeData when arrays are
nested.

Arrays of primitive values are serialized as contiguous values just like
std::vector<T>. For example, std::array<uint8_t, N> is serialized in
single-byte strides.

Bug: 207087196
Test: binder_parcel_fuzzer
Change-Id: I333c386cbe281d44ce15b45a343d03cdbbdccb6d