Merge "tryRegistrationImpl: better error checking" am: 1602b7d606 am: 98adfb9a1f am: 0330c1a5f6

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/1367567

Change-Id: Ibce0d5d3b09da38f519d6f2b62aa4c83a862c587