perf: used specialized context utils

[omedkane]

Problem ⚠️

// This will cause rebuilds if any other component of context change like size, viewInsets, etc
MediaQuery.of(context).padding
MediaQuery.of(context).size // Idem
MediaQuery.of(context).viewInsets // Idem

Solution ✅

MediaQuery.paddingOf(context).padding // listens only to padding
MediaQuery.sizeOf(context) // listens only to size
MediaQuery.viewInsetsOf(context) // listens only to viewInsets
// etc

Pre-launch Checklist

• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making or feature I am adding, or @jonataslaw said the PR is test-exempt.
• All existing and new tests are passing.