Merge "Use stub-annotations to provide NonNull for hwbinder-stubs-docs" am: c4b72cd7ef am: 950e51fbd4 am: 4ee9e4609f

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1636905

Change-Id: I7a1b447f85bda54aa00847918146e4ccff4ab0d5