Explanation

[WIP]

Fixes part of #5343

• This PR Introduces RunCoverageForTestTarget and CoverageRunner script utilities to run code coverage for a specific bazel test target.
• Originally the RunCoverageForTestTarget was planned to be RunCoverage, but now since the new approach is to use filenames primarily for the script execution which will need introduction of another script (probably named as RunCoverage for simplicity) to avoid conflicts I renamed this to RunCoverageForTestTarget.

Essential Checklist

• The PR title and explanation each start with "Fix #bugnum: " (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• Any changes to scripts/assets files have their rationale included in the PR explanation.
• The PR follows the style guide.
• The PR does not contain any unnecessary code changes from Android Studio (reference).
• The PR is made from a branch that's not called "develop" and is up-to-date with "develop".
• The PR is assigned to the appropriate reviewers (reference).

For UI-specific PRs only

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• For the screenshots above, include both English and pseudo-localized (RTL) screenshots (see RTL guide)
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