kyo__hei

Results 2 issues of kyo__hei

Fixed a problem that slight differences occurred during color conversion.

### Steps to reproduce 1. Modify MainActivity.kt to use FlutterFragmentActivity instead of FlutterActivity. 2. Run the official example of StatefullShellRoute from the go_router package. The example can be found [here](https://github.com/flutter/packages/blob/main/packages/go_router/example/lib/stateful_shell_route.dart)....

c: regression
package
has reproducible steps
P1
p: go_router
fyi-android
team-go_router
triaged-go_router
found in release: 3.24
found in release: 3.25