HwBinder: Remove use of IHw class.

Note that this is somewhat of a hack, until we properly
solve b/33440494.

Bug: 33440494
Bug: 33173166
Test: mma, hidl_test, hidl_test_java
Change-Id: I7db8eb11c8c9c624f2f5ed11bef6c32f155b5a76
1 file changed