Add support for reading/writing a vector of binders

Test: unit tests pass
Bug: 24470786
Signed-off-by: Casey Dahlin <sadmac@google.com>

(cherry picked from commit eb8e15f9bb29f8794f8be819530631c358fd6a15)

Change-Id: Ia5a282b80c8dea65db296a74edba4f4d4e1000de
2 files changed