Fixes #4771 - Add method for sessions of type

[NotWoods]

Fixes share tabs to use the new method.

Long-term I want to uplift this to Android Components, but that'll probably happen with browser-state instead so this is a good quick fix.

Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@a65f220). Click here to learn what that means.
The diff coverage is 8.33%.

@@           Coverage Diff            @@
##             master   #4782   +/-   ##
========================================
  Coverage          ?   6.41%           
  Complexity        ?     154           
========================================
  Files             ?     206           
  Lines             ?    9012           
  Branches          ?    1338           
========================================
  Hits              ?     578           
  Misses            ?    8395           
  Partials          ?      39

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/org/mozilla/fenix/home/HomeFragment.kt	0% <0%> (ø)	0 <0> (?)
...enix/components/toolbar/TabCounterToolbarButton.kt	0% <0%> (ø)	0 <0> (?)
.../main/java/org/mozilla/fenix/ext/SessionManager.kt	100% <100%> (ø)	0 <0> (?)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a65f220...036bdd5. Read the comment docs.