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

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

Change-Id: I8d9d372ee749ccc6e981658a330f5cf6bcbc7545
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>