1. Add iOS and macOS migration to mark "last upgraded" Xcode version to 14.3 to prevent `Update to recommended settings` warning.
2. Update iOS and macOS templates to same.
3. Update iOS template to set `BuildIndependentTargetsInParallel` to YES as suggested. I didn't add a migration for this since it seems like a minor optimization and I don't think it's worth a potentially botched/corrupted migration.
4. Run all example/integration test project to see migrator work.
5. Add some missing test projects to the build shard since I noticed they were missing and I had to build those manually outside `SHARD=build_tests`.
Fixes https://github.com/flutter/flutter/issues/125817
See https://github.com/flutter/flutter/pull/90304 for Xcode 13 example.
Adds a check for the case where a device has no battery present. The
devicelab test expects the text "No battery." in the case where a device
has no battery. This is triggered by returning an error with a
NO_BATTERY error code.
Also applies some cosmetic fixes:
* Amends a copyright notice to Flutter instead of com.example
* Deletes an unused test.
Issue: https://github.com/flutter/flutter/issues/79204
Adds a macOS implementation of the platform_channel example,
demonstrating method channels and event channels with a battery power
plugin.
Adds platform_channel_sample_test_macos macOS host test to verify the
sample works.
Issue: https://github.com/flutter/flutter/issues/79204
