Add readStrongBinder that takes an interface

We use a template function to let us pass arbitrary interfaces, all of which
can be cast to IBinder.

Change-Id: Iadf21c495cde43e8a5adb85a49e6592196f401ff
Test: unit tests
Bug: 23600713
Signed-off-by: Casey Dahlin <sadmac@google.com>
2 files changed