Compose placeholders

[planarvoid]

Fix

In this PR I'm implementing a parallel solution that allows you to draw placeholders in Jetpack Compose instead of Android Views. This is actually more reliable, especially when considering redrawing which was hard to do with AV.
I created the compose placeholder manager from the previous manager and cleaned up things that I think are not necessary with compose. It should be much more straightforward because the compose view should be redrawn when the state changes without any forced redrawns.

This PR is much smaller than it seems because ViewPlaceholderManager is just a rename of PlaceholderManager so it doesn't need to be reviewed.

Test

Test this feature with the related DO PR.

Review

@danilo04

Make sure strings will be translated:

• If there are new strings that have to be translated, I have added them to the client's strings.xml as a part of the integration PR.