Merge "Add documentation to WebChromeClient.onShowFileChoosers" into main am: ea3abee0de am: 54829a72b3

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

Change-Id: I7de5d6f84ccea11406a648125f8fda5ec53ffd07
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>