Fix HtmlTagImg typing.
Fix HtmlTagImg typing.

nashvail/zulip-mobile,nashvail/zulip-mobile,Sam1301/zulip-mobile,Sam1301/zulip-mobile,vishwesh3/zulip-mobile,Sam1301/zulip-mobile,nashvail/zulip-mobile,Sam1301/zulip-mobile,nashvail/zulip-mobile,Sam1301/zulip-mobile,kunall17/zulip-mobile,vishwesh3/zulip-mobile,Sam1301/zulip-mobile,kunall17/zulip-mobile,vishwesh3/zulip-mobile,kunall17/zulip-mobile,vishwesh3/zulip-mobile,kunall17/zulip-mobile