Merge "Export framework turbine stubs as android_stubs_private" am: fc21a809 am: 5d0477a2

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2304482



Change-Id: Ie84783241139b273bf9c5e5a5663cbed60d04911
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>