Merge "idegen: traversing all vendor-specific excludes" am: c65b20e6b6 am: 2f10578152 am: 61d873d3c8

Original change: https://android-review.googlesource.com/c/platform/development/+/1264719

Change-Id: I5d25e955d802a1c1c3779a769c68276f25b33aab