 webView: Adjust content when soft keyboard toggles. (#1664)
 webView: Adjust content when soft keyboard toggles. (#1664)

* webView: Adjust content when soft keyboard toggles.

Fix: #1642

* Fix: resize event not working on Android.

* Fix: regressions in scroll position when keyboard hides.

vishwesh3/zulip-mobile,kunall17/zulip-mobile,kunall17/zulip-mobile,vishwesh3/zulip-mobile,kunall17/zulip-mobile,kunall17/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile