Update barbet SVN to  50 am: a7cd2964e2 am: a0f582368e

Original change: https://googleplex-android-review.googlesource.com/c/device/google/barbet/+/24896727

Change-Id: I2997e5f3e4ba2362e9e8faba4642d499cb65f45f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>