[native] Delay PasswordSelection autoFocus on Android

Summary: While playing around with 1Password on Android, I noticed that the autofill prompt didn't appear when we autoFocused the password TextInput in PasswordSelection. However, it would appear if the user subsequently pressed / selected the TextInput manually.

Test Plan: I tested release builds with various delays for the focus on two phones: my Pixel 6a, and the older Pixel 3 in the office. 250ms consistently worked for both, while 100ms did not.

Reviewers: atul, ginsu

Reviewed By: atul

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D8000