Merge "Update description for debug.renderengine.backend" into main am: be85d4f3

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/3052647



Change-Id: I756353fc336a2b2678a011272f90aa49a97e9e6e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>