Add tests for ext package

[NotWoods]

Add in tests for the View extensions, NavController extensions, Log methods

Pull Request checklist

• Tests: This PR includes thorough tests or an explanation of why it does not

[codecov-commenter]

Codecov Report

Merging #11334 into master will increase coverage by 0.05%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master   #11334      +/-   ##
============================================
+ Coverage     20.57%   20.63%   +0.05%     
  Complexity      659      659              
============================================
  Files           368      368              
  Lines         15037    15020      -17     
  Branches       2018     2018              
============================================
+ Hits           3094     3099       +5     
+ Misses        11652    11629      -23     
- Partials        291      292       +1     

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/org/mozilla/fenix/components/Analytics.kt	20.75% <0.00%> (ø)	1.00 <0.00> (ø)
app/src/main/java/org/mozilla/fenix/ext/Context.kt	39.13% <ø> (+14.80%)	0.00 <0.00> (ø)
app/src/main/java/org/mozilla/fenix/ext/Log.kt	0.00% <ø> (ø)	0.00 <0.00> (ø)
...c/main/java/org/mozilla/fenix/ext/NavController.kt	44.44% <100.00%> (+16.66%)	0.00 <0.00> (ø)
app/src/main/java/org/mozilla/fenix/ext/View.kt	100.00% <100.00%> (+23.07%)	0.00 <0.00> (ø)
...src/main/java/org/mozilla/fenix/ext/ImageButton.kt	100.00% <0.00%> (+33.33%)	0.00% <0.00%> (ø%)

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[ekager]

it looks like some of them are adding? am i misunderstanding what the inset fun is doing?

[NotWoods]

The inset function adds for top/left, subtracts for right/bottom:

    public void inset(int dx, int dy) {
        left += dx;
        top += dy;
        right -= dx;
        bottom -= dy;
    }