Error on web implementation due to missing battery and thermal implementations

[EvertonMJunior]

Hello,

Running the package on web, I discovered a bug. On stream_video/src/call/sfu_stats_reporter.dart, there are two methods that are unimplemented in web being called, being isInBatterySaveMode() from package battery_plus, and getThermalStatus() from package thermal.
When trying to connect to a call, these errors are preventing the correct flow of the connection:

ErrorLogger
🛑 message: Error joining room
🛑 errorMessage: UnimplementedError: isInBatterySaveMode() has not been implemented.
🛑 errorKind: null
🛑 errorStackTrace: ../dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 288:3  
throw_
../packages/battery_plus_platform_interface/battery_plus_platform_interface.dart 47:5  get
isInBatterySaveMode
../packages/battery_plus/battery_plus.dart 44:22                                       get
isInBatterySaveMode
../packages/stream_video/src/call/sfu_stats_reporter.dart 77:42                        <fn>
...

DartError: MissingPluginException(No implementation found for method getThermalStatus on channel    
thermal)

[EvertonMJunior]

The unavailability of the methods is advertised on:

battery_plus

thermal (they are not as explicit in saying that calling the methods will yield in an exception, but they do say web is not supported)

[EvertonMJunior]

Just submitted #837 with the fix. The problem was solved on my end, hope you can reproduce it and verify it on your end!