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

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

Change-Id: I96562a6850cf4103b305e44f347f0be974c33dbe
Signed-off-by: Automerger Merge Worker <[email protected]>