Merge "Add documentation to WebChromeClient.onShowFileChoosers" into main am: ea3abee0de

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3077744

Change-Id: I15ec0984a9768e7b70b568ce604184d97c0d42dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>