Make nimbledroid not depend on a real token on staging releases

[JohanLorenzo]

Hey @kglazko!

I remember we talked about making the nimbledroid task easier to use when doing staging nighlies/releases. I found a way that still kicks off the task, but doesn't interact with the Nimbledroid service. How does it look to you?

Pull Request checklist

• 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

[JohanLorenzo]

This line is inspired by this logic in the build tasks:

fenix/taskcluster/fenix_taskgraph/transforms/build.py

Lines 52 to 59 in b23ee38

	task["run"]["pre-gradlew"] = [[
	"echo", '"{}"'.format(fake_value), ">", target_file
	] for fake_value, target_file in (
	("--", ".adjust_token"),
	("", ".digital_asset_links_token"),
	("-:-", ".leanplum_token"),
	("https://fake@sentry.prod.mozaws.net/368", ".sentry_token"),
	)]

[codecov-io]

Codecov Report

Merging #7570 into master will increase coverage by 0.81%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #7570      +/-   ##
============================================
+ Coverage     18.66%   19.47%   +0.81%     
+ Complexity      459      457       -2     
============================================
  Files           319      300      -19     
  Lines         12725    11500    -1225     
  Branches       1677     1554     -123     
============================================
- Hits           2375     2240     -135     
+ Misses        10149     9090    -1059     
+ Partials        201      170      -31

Impacted Files	Coverage Δ	Complexity Δ
.../java/org/mozilla/fenix/ext/ConnectivityManager.kt	14.28% <0%> (-28.58%)	0% <0%> (ø)
...rg/mozilla/fenix/components/toolbar/ToolbarMenu.kt	77.27% <0%> (-18.38%)	0% <0%> (ø)
...java/org/mozilla/fenix/components/FenixSnackbar.kt	0% <0%> (-15.28%)	0% <0%> (ø)
...ttings/advanced/DefaultLocaleSettingsController.kt	80% <0%> (-12.86%)	4% <0%> (-2%)
...fenix/settings/deletebrowsingdata/DeleteAndQuit.kt	57.14% <0%> (-9.53%)	0% <0%> (ø)
...rc/main/java/org/mozilla/fenix/FenixApplication.kt	4.95% <0%> (-9.34%)	2% <0%> (-1%)
.../src/main/java/org/mozilla/fenix/utils/Settings.kt	70.79% <0%> (-8.5%)	20% <0%> (-8%)
...deletebrowsingdata/DeleteBrowsingDataController.kt	88% <0%> (-7.46%)	0% <0%> (ø)
...in/java/org/mozilla/fenix/components/Components.kt	29.41% <0%> (-6.15%)	1% <0%> (ø)
...g/mozilla/fenix/settings/advanced/LocaleAdapter.kt	0% <0%> (-4.62%)	0% <0%> (ø)
... and 138 more

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[kglazko]

Looks good to me, but I'm not sure if you still want to make these changes given our talk today. If you want to for the short-term, feel free!

[JohanLorenzo]

Chatted on Slack with both @kglazko and @mcomella. We're good to land these changes!