Integrate nav drawer settings for default home page (#888)

## Description
Customizing the home page (#803) and nav drawer (#886) were developed
independently, so this PR just cleans up somethings so that those two
changes work together.

This PR restores the default home page when there is no customization to
be the same as before: continue watching/next up row(s) followed by the
order of the nav drawer libraries' recently added rows.

Finally gets rid of `NavDrawerIteRepository` and related functions which
all had weird, hard to follow code.

### Related issues
Related to #803 & #886

### Testing
Emulator testing

## Screenshots
N/A

## AI or LLM usage
None

app/src/test/java/com/github/damontecres/wholphin/test/TestHomeRowSamples.kt

@@ -121,8 +121,9 @@ class TestHomeRowSamples {
             HomeSettingsService(
                 context = mockk(),
                 api = mockk(),
+                serverRepository = mockk(),
                 userPreferencesService = mockk(),
-                navDrawerItemRepository = mockk(),
+                navDrawerService = mockk(),
                 latestNextUpService = mockk(),
                 imageUrlService = mockk(),
                 suggestionService = mockk(),