libbinder_ndk: read/write array for primitive types.

   type  | contiguous in NDK API | contiguous on the wire
  --------------------------------------------------------
   bool  | no*                   | no
   char  | yes                   | no**
   other | yes                   | yes

 *  std::vector<bool> as an implementation detail stores a packed byte
    array. This packed byte array is not exposed as an implementation
    detail, so even if we made bool contiguous on the wire, we couldn't
    ever make it contiguous in the NDK API.

 ** read/write Int32/Int is called repeatedly which writes each
    char16_t into a 32-bit wide section on the wire.

Arrays in Java AIDL are also very annoying. Whereas in C++, their size
can be changed, in Java, because of the way out-parameters work, the
array size cannot be changed. We might consider adding a better error
when this happens.

Bug: 111445392
Test: atest android.binder.cts

Change-Id: I3934f7d5cd749810c4a512ac3fb57b63f9ae4ea5