ImsServiceEntitlement: let webview take focus when it attahces to window am: 34d5959f58 am: 2ec67bb7cf

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ImsServiceEntitlement/+/19458900

Change-Id: Ibdb3f9dd5f0c7463134de68e2c0e0b3e04d55e1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>