Update: reduce recomposition of TimeLane

[warahiko]

Issue

• close #867

Overview (Required)

TimeLane composable is recomposed by every scroll, so we should reduce recomposition.

• change List to ImmutableList
• LazyListItemInfo#offset is changed by every scroll, but it is used only for changing offset of Box composable, so we can pass it by lambda function
  • TimeLane composable will be recomposed by changing visible items
  • LazyListItemInfo#index is not changed by every scroll

Links

Screenshot

No change in appearance

Note

I have no idea how we can use drawBehind() to solve this problem. If you have it, please give me advice.

I'm sorry for being late 🙏

[takahirom]

👀