[Screen share] Update strings and icon for share-to-app dialog.

Bug: 352327853
Flag: NONE string changes
Test: Share screen to app -> verify dialog has new strings and icon for
both single app case and entire screen cast
Test: atest ShareToAppPermissionDialogDelegateTest

Change-Id: Ib5ad8dacf0ce1bab63c7d0c4054551998e2a34cb
3 files changed