Merge "Add targets to build doc-stubs for non-updatable" into sc-dev am: 714f840a am: 24181d42

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14467998

Change-Id: I0fce10e6b14a0e28e39d42be5680d1c17f858231