Extract IntentProcessorType to its own file and add tests

[NotWoods]

---

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
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues finished by this pull request are added to the milestone of the version currently in development.

To download an APK when reviewing a PR:

1. click on Show All Checks,
2. click Details next to "Taskcluster (pull_request)" after it appears and then finishes with a green checkmark,
3. click on the "Fenix - assemble" task, then click "Run Artifacts".
4. the APK links should be on the left side of the screen, named for each CPU architecture

[gabrielluong]

This looks good to me. I think we can have a better commit message by explicitly saying we refactored IntentProcessorType into its own file and added test for IntentProcessorType.

[codecov-io]

Codecov Report

Merging #7012 into master will decrease coverage by <.01%.
The diff coverage is 95.45%.

@@             Coverage Diff              @@
##             master    #7012      +/-   ##
============================================
- Coverage     18.72%   18.72%   -0.01%     
- Complexity      423      425       +2     
============================================
  Files           284      283       -1     
  Lines         11207    11173      -34     
  Branches       1530     1527       -3     
============================================
- Hits           2099     2092       -7     
+ Misses         8944     8919      -25     
+ Partials        164      162       -2

Impacted Files	Coverage Δ	Complexity Δ
...n/java/org/mozilla/fenix/IntentReceiverActivity.kt	67.74% <100%> (-3.37%)	5 <0> (ø)
...rg/mozilla/fenix/components/IntentProcessorType.kt	91.66% <91.66%> (ø)	6 <6> (?)
...pp/src/main/java/org/mozilla/fenix/HomeActivity.kt	8.52% <0%> (-0.43%)	8% <0%> (ø)
...a/org/mozilla/fenix/browser/BaseBrowserFragment.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...c/main/java/org/mozilla/fenix/home/HomeFragment.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
.../java/org/mozilla/fenix/settings/LoginsFragment.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...g/mozilla/fenix/perf/HotStartPerformanceMonitor.kt
...rc/main/java/org/mozilla/fenix/perf/Performance.kt
...src/main/java/org/mozilla/fenix/components/Core.kt	17.77% <0%> (+0.19%)	1% <0%> (ø)	⬇️

---

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 76e9200...82a3c9e. Read the comment docs.