Avoid eager initialization of bugsnag tasks

[fractalwrench]

Goal

Avoids eager initialization of bugsnag tasks by supporting Task Configuration Avoidance. Previous changesets such as #227 made pre-requisite changes, but the use of task.get() triggered creation of bugsnag tasks during the Configuration phase which impacts build performance.

Changeset

This changeset builds on #261 which has been reviewed by @fractalwrench. The majority of the new changes in this PR relate to the E2E scenarios as the request order has changed due to the different mechanism used to register bugsnag tasks.

BugsnagUploadProguardTask has been updated to use a ConfigurableFileCollection and @InputFiles for the mapping file property. These do not require a file to exist at the time of task registration - which would otherwise fail the build as the mapping file doesn't exist until late in the build lifecycle. This mirrors the approach already used for BugsnagReleasesTask.

On AGP 3.5.X the tasks add a mustRunAfter dependency on the package task, as the ordering is otherwise incorrect and the mapping file would not exist. This leads to a degradation as configuration avoidance can't be supported, and also results in manual invocations of the upload/bundle upload tasks failing. This is seen as acceptable due to the low number of users on this version, the less common use-case, and a simple workaround of updating AGP version.

Tests

• Updated E2E scenarios to deal with new request order
• Skipped manual upload scenarios on AGP 3.5.0 for graceful degradation of behaviour
• Ran a gradle build scan and confirmed that only 2 tasks are created by the bugsnag plugin during the configuration phase, whereas previously 220 were created

[ZacSweers]

Nice!

[imjoehaines]

Do we have a ticket to fix & re-enable the newly skipped tests? I'm a bit concerned by the loss of coverage, but otherwise this looks good

[fractalwrench]

PLAT-4842 should cover allowing the tests to be enabled once more - this is just an issue with the order in which requests are received on particular AGP versions.