hwbinder: remove blockUntilThreadAvailable am: 87db54cf6a am: 579d0fdd06 am: eeb4f36fcf am: 1042898808

Original change: https://android-review.googlesource.com/c/platform/system/libhwbinder/+/1446175

Change-Id: Ie6c6fefef2f0331977891dfa99ce0bd84aa68938