Set default profiling rate on iOS 32 bit devices to 500Hz (#29347)
Set default profiling rate on iOS 32 bit devices to 500Hz (#29347)

* Set default profiling rate on iOS 32 bit devices to 500Hz

The current default profiling rate is 1000Hz in the VM.

Fixes https://github.com/flutter/flutter/issues/92421.

* Address comments
jason-simmons/flutter_engine,devoncarew/engine,devoncarew/engine,rmacnak-google/engine,rmacnak-google/engine,chinmaygarde/flutter_engine,devoncarew/engine,rmacnak-google/engine,aam/engine,chinmaygarde/flutter_engine,rmacnak-google/engine,rmacnak-google/engine,aam/engine,aam/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,devoncarew/engine,chinmaygarde/flutter_engine,rmacnak-google/engine,aam/engine,aam/engine,devoncarew/engine,flutter/engine,chinmaygarde/flutter_engine,chinmaygarde/flutter_engine,devoncarew/engine,flutter/engine,aam/engine,flutter/engine,flutter/engine,jason-simmons/flutter_engine,flutter/engine,flutter/engine,aam/engine,jason-simmons/flutter_engine,flutter/engine,flutter/engine,rmacnak-google/engine,aam/engine,devoncarew/engine,jason-simmons/flutter_engine