Add a version check for bugsnag-android dependency

[fractalwrench]

Goal

Adds a version check for the bugsnag-android dependency, and disables writing to proguard files if the version is high enough that consumer proguard rules were already added to that artefact.

Changeset

Adds a method which collects all the dependencies for all the project's configurations, and filters these to find the version number of bugsnag-android. Disables automatic running of the Proguard config task if the version is greater than 4.6.0.

Tests

Manual test by changing the artefact version number in a sample project.

Review

For the submitter, initial self-review:

• Commented on code changes inline explain the reasoning behind the approach
• Reviewed the test cases added for completeness and possible points for discussion
• A changelog entry was added for the goal of this pull request
• Check the scope of the changeset - is everything in the diff required for the pull request?
• This pull request is ready for:
  • Initial review of the intended approach, not yet feature complete
  • Structural review of the classes, functions, and properties modified
  • Final review

For the pull request reviewer(s), this changeset has been reviewed for:

• Consistency across platforms for structures or concepts added or modified
• Consistency between the changeset and the goal stated above
• Internal consistency with the rest of the library - is there any overlap between existing interfaces and any which have been added?
• Usage friction - is the proposed change in usage cumbersome or complicated?
• Performance and complexity - are there any cases of unexpected O(n^3) when iterating, recursing, flat mapping, etc?
• Concurrency concerns - if components are accessed asynchronously, what issues will arise
• Thoroughness of added tests and any missing edge cases
• Idiomatic use of the language

[kattrali]

Should be TBD?