Fixes #206: Visibility of Toolbar on devices with api levels 19 or below
Fixes #206: Visibility of Toolbar on devices with api levels 19 or below

vishwesh3/zulip-android,zulip/zulip-android,Sam1301/zulip-android,abhaymaniyar/zulip-android,prati0100/zulip-android,Sam1301/zulip-android,abhaymaniyar/zulip-android,prati0100/zulip-android