Custom Tabs: Pressing the back button doesn't close the session

[jonalmeida]

See the following issues for STR:

• Playing video can be heard playing after closing Custom Tab reference-browser#660
• [Bug] Videos played from Custom tabs do not stop when custom tab is closed fenix#2097

We should be closing the session in the SessionManager before we invoke the close callback here: https://github.com/mozilla-mobile/android-components/blob/master/components/feature/customtabs/src/main/java/mozilla/components/feature/customtabs/CustomTabsToolbarFeature.kt#L109

┆Issue is synchronized with this Jira Task

[pocmo]

Mh, some time ago I added this to RB:
https://github.com/mozilla-mobile/reference-browser/blob/master/app/src/main/java/org/mozilla/reference/browser/BrowserActivity.kt#L72

[jonalmeida]

Mh, some time ago I added this to RB:
https://github.com/mozilla-mobile/reference-browser/blob/master/app/src/main/java/org/mozilla/reference/browser/BrowserActivity.kt#L72

Ah ha! This would go away when we fix this in the CT toolbar.