Currently the way integration tests and native Android UI tests are run in flutter/plugins is via Firebase Test Lab, but we can only run those jobs for PRs from contributors. That means we're missing our most critical Android test coverage in presubmit for non-contributor PRs.

We should add a set of shards that run integration tests via Android emulators on Cirrus (example) to close that coverage gap.

We will likely need to rethink the existing coverage so that we're not just adding to our already-significant time+resource usage for Android tests. Things we could consider:

• Making the FTL tests post-submit only
• Removing one of the two FTL device configurations

/cc @blasten