7102: Make sure the bottom toolbar is never stuck invisible r=Mugurell a=miDeb
Closes https://github.com/mozilla-mobile/android-components/issues/7101. This is my attempt to solve this issue. Essentially, if the user is scrolling upwards, but the toolbar is not being scrolled and not already showing or animating up, just forceExpand it.
Co-authored-by: Michael <michael.debertol@gmail.com>