Merge "Update setUserAgentString API description" into main am: fc31e4ed5a am: f4eb60fada

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2769265

Change-Id: Ib08b47badf4b8549e08f93f9e06629ef88d10e97
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>